Ninja Immovable Heart (2014) online

Reeve is a member of an elite covert group thought not to exist anymore, he is captured, beaten and brutally tortured, by the very Governments he used to work for. With the help of his old mentor John Carpenter, Reeve must strip away, and rid himself of the emerging demons of his past, so that he may understand the core essence of Ninjutsu, the Ninja's Immovable heart, in order to remember how and why he was captured, and what he is meant to do, before time runs out and his captors discover why he is really here.