Firefighter Adam Sterling is working hard to be accepted by his new colleagues when he and the firefighters of Blue Watch rescue Kim, the target of an arsonist. Adam is struck by her resemblance to someone from his past and sees an opportunity to repay an old debt.
Kim is in witness protection, but who is hunting her and why? Even the police officer investigating the fire, DS Eddy Arkwright, can't find a way through the maze of secrets.
Adam has to battle not only his natural enemy, fire, but an implacable foe determined to get his prey. He must use all his firefighting skills, and a few old tricks from his time in the Royal Marines, if he is to prevail.