Bianca is reunited with her mother Dubravka against her will, and quickly becomes a prisoner in her own home. Christian tries to evade the Mimicas and get back to the UK undetected to save her. Hannah and Billy have uncovered the mole and struck a deal with him to reveal all before Dubravka can intervene
DI Hannah Laing and crime boss Dubravka Mimica will both stop at nothing to protect their estranged sons. Hannah tries to identify the source of a leak from within the police force, while Dubravka comes under pressure from the family in Zagreb to shift drugs. Meanwhile, Christian and Bianca find that their Costa Rican hideout isn't as safe as it seems