DC Freya West has a secret. She has lost the man she loves, and if the truth gets out her career would be over too. DS Robin Butler is haunted by a tragedy. As he and West investigate a seeming case of misadventure, she learns a shocking fact about him and must decide whether to reveal it. Both detectives know it is only a matter of time until their lies are uncovered. Will they choose to keep each other's darkest secrets?