Grace is on a special FBI Taskforce for a prostitution ring. Her home life is about to be complicated by her mother, Vivian, who shows up after a long absence. Tom has something to say to Grace. Ethan and team negotiate their first contract.

Grace and team start search for Sarah after getting her cry for help voice message. Elliot lets Leni in on detail about the investigation. Cheat's partner's deal with aftermath of his death by eavesdropping in on police calls.

Grace discovers Ethan hasn't been truthful about the night Cheat died. Leni reaches out to a Pentagon contact to discover how Ethan and his team met. Detective Lee follows Ethan, who, along with his team, feels endangered. Billy and Evie grow closer.

Grace contemplates Elliot's proposal that she go undercover. Elliot confronts Leni about speaking to her Pentagon contact. Billy gets into a fight. Spud and Ray find a potential asset who can help them. Ethan meets with a contact to ask about Nina.

Someone from Grace's past visits her, which creates a problem with Ethan. Leni's Pentagon contact reveals new information. Grace finds out about Billy's fight. The taskforce plants a bug to spy on Ethan and his team.

A panicked Spud seeks Ethan's and Ray's help and hatches a plan for leaving town. Grace shares what she learned about Ethan with Leni and Elliot. Alec attempts to alter his deal with Campbell. Elliot makes an arrest which creates problems.

Ethan tells Grace they borrowed money from the wrong men. Suspicious, he checks out her background. She tries to help Billy but it backfires. Ray realizes something is wrong with Spud, and they have a heart-to-heart talk.

Ethan and Ray are forced to decide what to do about Spud. Leni and Grace speculate about the money Ethan has given away. Ethan tracks Grace. Billy tries to win Evie back, and she confronts Grace, who finds a new clue in the search for Sarah.

Leni and Grace make a surprise discovery in Vancouver. The truth about Cheat's death is revealed. Ethan and Ray follow their own leads to Vancouver and disagree about what to do with the money. Evie decides to stay with Tom.

Ethan and Ray fight. Grace apologizes to Evie. Leni and Grace discover the original source of Ethan's money. Sarah and Grace team up to track Ethan and Ray. Grace receives pushback when filing her report. Ethan is visited by high-ranking official. Grace is tasered and abducted, and Evie calls out for her, yielding no response.