As business booms at her DNA-based matchmaking service, co-creator and CEO Rebecca Webb seems unstoppable — until a body is found in the Thames.

Flashbacks reveal dark secrets of Ben's death. Megan seizes a chance for revenge. Rebecca's happily ever after suffers a heartbreaking blow.

Facing a murder investigation, Rebecca and James reunite to get their stories straight. Hannah plays a dangerous game with Megan and Mark.

Nudged by Kate, Matheus begins to doubt Rebecca. Mark makes a choice, and a betrayal. Sophia tells the truth about her mother's crash.

Rebecca schemes to stay CEO — and out of jail — while a new threat rises. Sebastian makes a confession to Kate, while Mark wrestles with his own desires.

Mark's birthday party for Hannah brings good — and very bad — surprises. Kate digs into Sophia's past. Rebecca plays hardball with James.

Fabio becomes a liability for Rebecca, leading to a risky bargain and a bittersweet reunion with Matheus. Hannah faces the consequences of her deceit.

Suspicious, Kate goads Rebecca at Ben's memorial service and pays an embarrassing price. Hannah tells Mark the truth about Megan.