Armed with hard-won skills and a new positive outlook, Nathan is poised at the beginning of a life freed from the misery that has weighed him down. But when his little sister Chloe is kidnapped by a hooded figure in a back alley, it precipitates Nathan into the wider world of his allies and enemies, and a whole new level of danger.

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Nathan is joined by Ethan, who helps to save Chloe's life. In return, Nathan finds himself striving to help Ethan unlock the mysteries of his past, and to keep Ethan from throwing away his soul in a nightmare-fueled quest for vengeance.

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As their paths cross, diverge, and cross again, Nathan and Ethan begin to learn the terrible secret that has driven Sifu Gideon into hiding - a secret which ties all of their destinies together.