Charlie has a hard time keeping up with Tracy, his new 23-year-old girlfriend who likes to party every night. Caitlin and Paul join them at a club one night and they are all arrested after one of Tracy's friends is caught with marijuana. Meanwhile, the Mayor is invited to a fund-raising gala by a very prominent member of the gay community, Martin, whom Carter has a crush on. Both Carter and Stuart also attend, and Martin hits on Stuart who is clueless to his advances, though they feed Carter's jealousy.
Jack and Mason use Palmer's campaign staffer Elizabeth Nash in a sting against Alexis Drazen which backfires badly on them. Kim makes a run for Rick's house after getting separated from Teri following the attack.
In a routine sweep, the Barn's detectives divvy up warrants. But when they cast their nets, they bring up far bigger fish than expected. While Vic holds a basketball star hostage to influence the outcome of an upcoming game, Dutch and Claudette nab an egotistical rapist out to impregnate as many women as possible.
It's Prank Day according to Kelso, who manages to trick his friends twice with his stunts. The guys' attempt to retaliate backfires horribly when Red triggers their prank instead. But rather than venting his wrath on Eric, Red joins the prank war to show the boys how it's done. Meanwhile, Jackie throws an impromptu slumber party to cheer Donna up on her parents' wedding anniversary.
Everyone arrives at work Monday morning to an awful odor.
The squad investigates two homicides: a gay man who hit his head after being punched out and another man shot on the street. Rodriguez is set-up by iab to take a bribe from an old friend.
When a mother of a missing child shows up in Nick Fallin's office at Legal Services, he finds himself in the middle of an emotional struggle for closure and justice. Prior to the disappearance of her daughter Grace, Janine McGregor was in a car accident with her for which they were awarded a large settlement. However, since Grace has been missing for 10 years, the insurance company will not release the money. After years of searching for her daughter, Janine believes her only chance to get the money she so desperately needs is to have Grace declared deceased. However, just as a judge is about to sign off on the declaration, Grace unexpectedly reappears saying she had been kidnapped and taken to Europe. Nick encourages Janine to take the necessary steps to verify Grace's identity. However, with nothing but her gut feeling, Janine is convinced that the girl who has returned claiming to be her daughter is really her "Gracie." Meanwhile, Nick and Burton Fallin are faced with the death of a close friend and colleague, Judge Stanton. He was a long-time friend of Burton's and was the judge who presided over Nick's probation. His passing causes Burton to re-evaluate his life and his accomplishments as a lawyer.
Aimee (Ozzy and Sharon's eldest daughter) schedules Kelly for a gynecologist's appointment without her consent. A panicked Ozzy fears that this means Kelly is sexually active, and refuses to listen to her claims to the contrary. The Osbournes' neighbors continually irritate them by blasting loud music outdoors in the middle of the night. Sharon confronts them, and tries to invite them over for tea to talk about the situation. They do not show up. On another night, the neighbors gather outside singing folk songs. Jack tries to counteract them by playing Norwegian death metal, and goes over to argue with them. Sharon winds up throwing a ham and bagels over the fence, prompting the neighbors to call the police. The cops arrive and tell Sharon to call them instead of getting into a confrontation. Ozzy finally becomes fed up with the late night parties. Despite Sharon's pleas, he goes next door and throws a log through the window.
Flex dates famous show host Michelle McCall. She'll date him and do anything for him but only if he keeps their relationship secret so her fans won't find out what she's been up to. They make love and the next day cameras and news reporters come flooding to Flex's door finding out about their relationship. Flex soon finds out that Duane is the one who squealed. Meanwhile Breanna's friend Natasha comes to town and she has a crush on Arnaz. When they meet they instantly fall in love but Natasha asks Breanna permission to date Arnaz. She allows her and they take their relationship to the next level but Breanna gets jealous along the way.
Nina talks Maya into dating a handsome but dumb exterminator. Maya is tested when she meets a smart man at an art gallery and sleeps with him. Meanwhile, Jack tries to teach Elliott and Finch a lesson when they begin paying Kevin to eat weird things.
Debra decides to run for school president, but Ray isn't sure he can handle the twins by himself during all school meetings, so he votes against her.
Professor Oglevee's nephew develops a crush on Nikki. Meanwhile, Kim feels left out of her cousin's friendship with Stevie.
Toni opens her real estate office and hires Lynn as her temporary assistant. However, Lynn quits after Toni proves to be too demanding a taskmaster. Toni quickly finds a very efficient replacement, but she also leaves when Toni won't let her have everything her own way. With her grand opening just days away, Toni becomes desperate to find someone to help her out. Meanwhile, Joan fears dire consequences from her boss after a judge throws out an important motion for a seemingly insignificant reason.
Greg's old high-school girlfriend, Stacey, is in town. Greg invites her and her husband, Bobby, over to visit so he can see her again. Looking at pictures of Sam, Dominic and Logan gets Stacey and Bobby to admit that they've been trying to have children of their own -- which hasn't been going all that well since Bobby has ""slow swimmers."" Stacey says they came to LA because it has the best fertility experts. When Greg tells her he's there for them if they need anything, she takes his offer a little too literally, and asks for his sperm. Kim is enraged when Greg says he'll think about it, and actually meant it. After Jimmy gloats how Christine would let him do it, Kim talks with her, and learns that she was lying so as not to start a fight. She also believes Greg wouldn't do it in a million years. So Kim pulls the same act with him, and is relieved that he isn't doing it. Greg lets Stacey and Bobby down easy, but both he and Jimmy are stunned when they turn right around and ask Jimmy fo
Doug's parents visit while Carrie's on a business trip and take over running the house, making Doug feel like a kid again. Also, Arthur tries to strike it rich by inventing a new type of screwdriver called "the Arthur's head."
Nate brings Claire to his old stomping ground in Seattle to help him retrieve the body of a man who feared flying. There, they stay with Lisa, a woman who still carries a torch for Nate.
Friday the 13th, Carl's favorite holiday, begins with the Foutley car breaking down, Ginger's sweater getting ripped, and her school paper being blown away. Then a rare house-eating mold is discovered in Ginger's house that causes it to be condemned. Will the streak of bad luck continue, and could it get any worse? Maybe if Ginger gets completely fed up with her family...
Monks arrive and claim that Tohru is their reincarnated leader. They take him to their temple where they hope to awaken the memories of his past lifetimes. But Daolon Wong, a dark chi wizard, plots to prevent his ascension.