When Detective Inspector Hannah Laing kisses her married lover Sean Hardacre goodbye one morning, she never imagines it will be the last time she will see her fellow detective alive. But Sean goes missing and his body is recovered the following day.

Determined to find whoever is responsible, Hannah accesses one of Sean's confidential contacts and persuades 'Issy' to help her with Sean's investigation into a Croatian family, the Mimicas, who are using their restaurant to launder drug money. Forced to operate undercover for fear of a leak at police HQ, Hannah and her new partner Billy Murdoch uncover a daring plot by the Mimicas to smuggle an enormous quantity of cocaine into the country. But when Hannah also discovers Issy's identity, she realizes there is far more at stake than bringing Sean's killers to justice.