Lucifer tries to figure out if Marcus is telling the truth about his involvement in Lucifer regaining his wings. Meanwhile, Chloe has had enough of Lucifer's selfishness and sets out to solve a case without him.

Ella's older brother Jay is the primary suspect in the murder of a diamond dealer, and she sets out to prove his innocence. Meanwhile, Marcus tracks down Amenadiel and wants revenge for Amenadiel putting the Mark on him and condemning Marcus to immortality.