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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.

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

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

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

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

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