Extraordinary jewellery heists in upper-class stores across Melbourne have been baffling the Melbourne police force. Each store targeted was fitted with the most sophisticated security system available, and yet, not a single alarm was activated in each attack. The only clue as to the perpetrator is a small token left behind at each location. The tokens are all identical, found on the forehead of a brutally murdered guard and inscribed with two words: "The Banca". When a jewellery store in Sydney is targeted next, Detective Billie McCoy's interest is piqued, but her mind is focused on more pressing personal matters closer to home. Jill Kuzac, cousin to Billie's best friend, was lucky enough to receive community work instead of a jail term, only due to Billie's support in the courtroom. Jill has barely finished her first month of service and is already lacking interest, particularly after meeting Harmony Conner. Billie's instincts make it hard to trust the newcomer, but before she can investigate further, her life is suddenly turned upside down. Incriminating evidence emerges that places Billie as the number one suspect in the latest jewellery heist. To make matters worse, the evidence links her to the murder of a former police officer at the scene. Billie has no choice but to go on the run. With the full force hunting her down, she will need all her skill to prove her innocence. If she's not careful who she trusts, she might just find she's the next person found with a token on her forehead...