Lucifer, the original fallen angel, is bored and unhappy in Hell and decides to retire to Los Angeles and open an upscale nightclub. After a murder takes place outside his club, he meets an intriguing homicide detective named Chloe, and partners up with her to solve cases.
Upon leaving hell, Lucifer Morningstar retreats to Los Angeles for a more exciting life. When the murder of a friend connects him with LAPD detective Chloe Decker, Lucifer becomes intrigued with the idea of punishing criminals, sending the devil himself into a struggle between good and evil.
When a movie star's son is killed after being chased by the paparazzi, Chloe takes a deep look into the case with a little help from Lucifer. Meanwhile, Maze and Amenadiel continue to encourage Lucifer to go back to hell.
When a 22-year-old future superstar quarterback wakes up to find a dead girl floating in his swimming pool, he turns to his friend, Lucifer, for help. Lucifer enlists Chloe to investigate the case, which leads to the world of big money sports and people who will literally kill to be number one.
In an effort to get over his infatuation with Chloe, Lucifer decides that he must seduce her. Meanwhile the two team up on a missing girl case and Amenadiel confronts Maze about his concerns about Lucifer.
After a shooting occurs at a fashion show and a young woman is killed, Lucifer becomes intrigued by the danger of the situation and begs Chloe to get in on the case. Meanwhile, when Maze admits to Amenadiel that she wants to go back to hell, he sets his sights on Dr. Linda.
Lucifer bails on Chloe when he becomes bored with her investigation into a ruthless biker gang murder. However, when he discovers something was stolen during the crime that was very personal to him, he demands that Chloe let him rejoin the case.
In attempt to find the contents of his stolen container, Lucifer enlists the help of an unlikely ally. Meanwhile, Chloe digs deeper into the Palmetto case, uncovering a lead that might finally expose the truth.
When a therapist is murdered, Lucifer and Chloe enlist the help of Dr. Linda to look into possible suspects. Meanwhile, Malcolm confronts Chloe about the night he was shot, and Lucifer experiences his first bout of jealousy.
A priest seeks out Lucifer's help when he suspects an underground drug operation has set up shop at a neighborhood youth center. Meanwhile, Malcolm manipulates a way to keep an eye on Dan.
Lucifer and Chloe are tasked with solving the murder of a prominent restaurateur. When they meet his son, they suspect he played a part in the death. Meanwhile, Chloe's mom returns home, sending Chloe's life into upheaval, as Lucifer learns his own dysfunctional family isn't nearly as unique as he thought.
When philanthropist Tim Dunlear is found dead, Lucifer explores his good side by becoming a benefactor for Tim's glitzy Los Angeles charity.
When a woman is found dead on the Hollywood Walk of Fame – with her body twisted into the shape of a pentagram – the investigation leads Lucifer and team into the world of Satanists, where they soon realize, evil doesn't always live where we expect it to.