For seven elite profilers, finding a serial killer is a process of elimination. Their own. Hiding within a group of eight FBI profilers on a training simulation is a serial killer. When one of the agents meets an unexpected demise, the team realise that this is more than just a final exam - it's a battle for their very lives. Isolated from the outside world, the fear begins... In the ultimate test of their crime-solving savvy, these endangered young agents - each compelled by his or her secret past to probe the criminal mind - must figure out who among them is a ruthless killer... Before, one-by-one, they all fall prey to the killer's ingenious plan. Inspired by Agatha Christie's Ten Little Indians, the story crescendos in suspense as the group realise that a terrible evil has entered their circle and they may not get out alive... How can they trust one another when they each possess the skills, the motives and means to be a murderer