When Ben Ashurst agrees to participate in a study of the biology of human emotions for this charismatic Oxford tutor, he can't begin to imagine what lies ahead. With a luxury resort on a beach in Kenya as the site of the experiment and his beautiful new girlfriend along for company, it seems the perfect way to spend the Christmas holidays. But paradise starts to lose its luster when Ben runs afoul of the local police and discovers that his girlfriend may have another agenda in coming to Kenya. Without warning, Ben finds the experiment veering from abstract scientific theory into terrifyingly real danger. Snared in a carefully crafted web of deceit, he scrambles to learn who is controlling his fate. His tutor's obsession with game theory suggests a possible course of action, but every time Ben thinks he's discovered the winning move, he finds another level of deception and betrayal.