Traumatized by the September 11th attacks, one man struggles to dismantle official history, at the expense of his sanity and even his life. Grappling with multiple realities - and multiple personalities - he must retreat into his mind in pursuit of the truth. In a fictional film about non-fictional events, there is a place where belief and faith will blind you, where nothing is sacred, and to get there all you have to do is ask: "Who Killed John O'Neill?"