Andrew hopes to assure his investment firm's future with new software. His ICT expert being unavailable, he gives Malcolm, a professor, a shot, which Bridget arranged as her man is running out of money and options. She gets Henry to agree to a meeting sos he can explain her erratic behavior and the Gemma drama, but that goes south because of the real Siobhan, who returned from Paris as her lover Tyler no longer puts their affair over company loyalty to Andrew, and impersonates herself in therapy and home to sabotage Bridget, who ends up seeing her with unsuspecting ...
Juliet's mother Catherine arrives in town, where she proceeds to wreak havoc on Andrew and Bridget's relationship. Bridget discovers someone from Siobhan's past and thinks he might be the key to her learning more information about her sister. Meanwhile, Henry discovers a lead that causes Agent Machado to think he is closing in on Bridget.
Bridget visits some of the last locations Siobhan went before she disappeared and discovers that Siobhan kept a secret office. Olivia finds out some information about Henry and blackmails him into introducing her to Gemma's wealthy father Tim Arbogast. Meanwhile, in Paris, Tyler struggles with a moral decision that could affect Siobhan and Andrew.
Bridget encounters Dylan, who was an important part of the sisters' past. After finding something in Henry's possession that belongs to Bridget, Malcolm befriends Henry to keep an eye on him. Catherine asks Andrew to make a big decision regarding Juliet that could change their family dynamic.
Andrew proposes again and Bridget realizes she is in over her head. Olivia becomes increasingly suspicious of Malcolm while he is working at Martin/Charles. Juliet makes a decision that forces her mother Catherine to take drastic measures.
Agent Machado's past with his informant, stripper Shaylene Briggs is revealed and Siobhan deceives Malcolm when she pretends to be Bridget. In Paris, Tyler takes something from Siobhan that is a key piece of evidence in her plot for revenge. Henry realizes Bridget knows more than she should and has to keep her from interfering with his plans.
Bridget fears that something has happened to Malcolm when she cannot get in touch with him. In an effort to find him, Bridget visits the hotel where Malcolm was staying and discover on security footage that Andrew was the last person to see Malcolm before he disappeared. Meanwhile, Juliet discovers that someone in her family played a part in the attack on Tessa and Siobhan admits to Henry the reason she faked her death.
After an attempt is made on Bridget's life, Agent Machado is determined to find who was responsible. Henry accuses Siobhan of putting a hit out on Bridget, while Bridget thinks Olivia was behind it. Meanwhile, Andrew admits to asking Malcolm to leave town and Juliet goes missing.