Marisol learns a secret from Genevieve’s past that may provide a clue to finding Peri’s killer. Zoila struggles to balance her love life and her demanding new boss, while also helping Rosie investigate The Circle. Danni appears to be warming up to Carmen, but her motives aren't so pure. Spence helps Rosie when Miguel begins to act out at school.
As the Molly Ryan murder case ramps up, the case against Grace has never looked worse. Natalie reveals to Stan that Molly worked as a prostitute at The Courtenay, and that Grace may have as well. Stan buries any Courtenay connection to Grace, but tips off the press to Molly’s connection to this dark, dangerous world. Natalie confronts Grace with what she’s discovered and, if anything, leaves even more disturbed by her sister’s potential guilt – especially after Bruno shows her a tape of Grace planting evidence. But before giving up on her sister completely, Natalie turns to an unlikely source for information about Molly’s murder. Meanwhile, Prince Theo’s lies begin to unravel as Charlotte finds a surprising way to confront him about his dead “dog” named ‘Molly,’ and Kaley discovers that Theo is her mysterious Gentleman 33. Roz finds herself in over her head with both Stan and Finch. Later, Grace is forced to make a desperate move to protect herself.
After a shootout in a tow yard leaves three people dead, Major Crimes must scramble to find a disturbed man with a bag full of guns and a long list of grievances before he kills again. Meanwhile, Rusty pushes against LAPD policy in an attempt to find more evidence related to the murder of Buzz's father and uncle.
On the morning that Jane is about to testify in a murder trial, she discovers that a key piece of evidence has been stolen. BPD has three days to re-solve the crime, or else the murderer may go free. When Frankie discovers Nina is a fan of magic, he decides to learn a few tricks to impress her.
Lena and Stef are shocked by a secret Lena's father has been hiding that could jeopardize the entire family. Meanwhile, Lena confronts Brandon about the money he gave Cortney; Mariana must deal with the male members of her STEAM team; Jesus begins to resent Emma; and Jude discovers Noah has a medical marijuana card.
Coleman tries to coerce Rachel into helping him destroy Quinn and the show, but Rachel has her own plan. Meanwhile, Darius and Jay join forces to ensure their ideal contestants make it to the finale; and Quinn receives perspective-changing news.