Grace is on a special FBI taskforce investigating a prostitution ring. Her home life is complicated by her mother, Vivian, who shows up after a prolonged absence. Tom has something to tell Grace. Ethan and team negotiate their first contract.

Grace confronts Elliot and Leni about her concerns for finding Sarah. Evidence is uncovered. Detective Lee becomes a liason. Elliot reveals to Leni the true nature of their investigation. Ethan, Ray and Spud find out about Cheat and take action.

Grace discovers Ethan hasn't been truthful about the night Cheat died. Leni reaches out to a Pentagon contact and discovers how Ethan and his team met. Detective Lee tails Ethan. Ethan and the team feel they're in danger. Billy and Evie grow closer.

Grace contemplates Elliot's proposal that she go under cover. 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.

Grace receives a surprise visit from someone in her past which creates a new wrinkle for her 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.

Spud calls Ethan and Ray in a panic. Grace fills in Leni and Elliot on what she's uncovered from Ethan. Elliot runs into problems after he arrests a man on their suspect list. Alec tries to change the terms of his arrangement with Campbell.

Ethan reveals to Grace they borrowed money from the wrong men. Ray realizes something is wrong with Spud. Ethan, suspicious, digs into Grace's background. Grace tries to help Billy but it backfires. Spud and Ray have a heart-to-heart talk.

Ethan and Ray are forced to figure out 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. Evie confronts Grace. Grace 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. Evie decides to stay with Tom. Ethan and Ray disagree about what to do with the money.

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.