CHIN's

When a best-selling novelist is murdered, Lucifer and Chloe discover that her books are based on real people from her past, and must infiltrate her high school reunion in order to catch her killer. Meanwhile, Amenadiel and Linda struggle with making their relationship public.

When it is discovered that the flaming sword is the only hope for the family returning home safely, the pressure is on for Lucifer to control what he has never been able to control before – his emotions – in order to ignite it. Meanwhile, Chloe wants to air some emotions of her own, but when a therapist and head of admissions at a prestigious private school turns up dead, the team must get to the bottom of it.

Eric pulls Donna's pants down in public and reveals her granny panties to everyone. So he tries to make up by giving her sexy panties on Valentine's Day. When Kelso finds out that Laurie cheated on him he realizes how Jackie must have felt when he cheated on her with Laurie; to Jackie's surprise he doesn't want her to feel sorry for him. Fez asks Caroline to go steady with him and only afterwards does he finds out that she has some strange ideas about romance.

With her parents away, Jackie plans on throwing a small, classy dinner party. Kelso tries to turn it into a fun party, and invites everyone he knows; Jackie is upset, and when Kelso tries to fix things, he only ends up making them worse. Hyde makes it with a snobby girl from school, but the guys don't believe him. Red finds out that Bob wears a toupee, and then has to spend an uncomfortable evening not talking about it.

Kitty thinks that it would be a good idea if Red and Eric become friends. She forces Eric to invite Red to go with the gang to a wrestling event in Kenosha. Bob tags along and seeks help from Fez and Hyde over Midge's decision to start therapy. And Jackie is super nice to Kelso now that they've done the deed.

Jules, not wanting to spend Valentine's Day alone, turns to Grayson to keep her company when everyone else makes plans. Meanwhile, Bobby and Jules take different sides when Travis asks to go to a party where they know he will be drinking; Ellie tries to prove she is the alpha dog, not Grayson; and Laurie meets Smith's father.

Conan and the Gang and searching for a classmate's cat when they find a dead body in the bathroom of a local house. They rush to fetch the police but when they arrive fifteen minutes later there's no body. They search all over but cannot find any trace.

When Gina returns to the Nine-Nine, Jake and Terry get drawn into her life. Holt learns that Charles’s son, Nikolaj, may be a genius. Rosa copes with an injury.