CHIN's

When a murder investigation reveals the dark side of Hollywood, Chloe puts her life on the line to protect an innocent victim. Then, Lucifer comes up with a hell-raising scheme to help Cain, but when Amenadiel and Maze get involved, things don't quite go as planned.

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 Chloe and Lucifer's investigation into the murder of a diamond thief points to one of Ella's brothers as the main suspect, Ella is driven to prove her brother's innocence and recruits an unlikely ally. Meanwhile, Linda is upset when Charlotte comes to her for help and Detective Pierce hashes out his issues with Amenadiel.

When an ecstasy cook-turned-chemistry-teacher is found murdered in a cozy Los Angeles suburb, Lucifer and Pierce must go undercover to help track down the killer. Meanwhile, Maze has a newfound attraction for someone that she used to despise and Charlotte has a revelation.

After Lt. Pierce's true identity is revealed, Lucifer tries to figure out his motives. In order to earn Chloe's assistance in his investigation of Pierce, Lucifer goes above and beyond to help her solve the murder of a professional surfer. Meanwhile, Amenadiel deals with a personal health issue.

In a flashback episode that takes place when Lucifer first came to LA, Amenadiel comes to retrieve his fallen brother, but is shocked when he is mugged. Amenadiel enlists Lucifer's help to track down the mugger and Lucifer, in turn, offers his assistance – but only in exchange for a favor. Meanwhile, Chloe and Dan – who are still married – investigate the murder of an MMA fighter, Aidan Scott, at the hands of the same killer who mugged Amenadiel.

With the Sinnerman in custody, Lucifer is prepared to go to any length to get his devil face back. Meanwhile, Trixie is introduced to Charlotte and questions the relationship she has with her father.

Lucifer is worried when he realizes that recipients of his favors start to turn up dead. After he and Chloe investigate, they are finally brought face-to-face with the Sinnerman. Meanwhile, Detective Pierce returns to work after taking a bullet, Charlotte finds a new career and Amenadiel has a new love interest.

When a murder is connected to a celebrity dating app, Lucifer and Chloe question all they know about the world of social media in order to solve the case. Meanwhile, Ella tries to avoid Charlotte, and Amenadiel helps Linda deal with the death of her ex-husband.

A reporter seeks revenge when he discovers Lucifer has been sleeping with his estranged wife; a serial killer from Lucifer's past resurfaces.