Foreign volunteers keep showing up in the war against Islamic State, and this film asks why someone leaves home to fight a conflict that isn't theirs. The term comes up early: the Robin Hood complex, a drive to intervene on behalf of strangers under attack. The film follows Western men who have joined Kurdish militias and other anti-ISIS forces on the front lines in Iraq and Syria, sitting with them in makeshift bases and trench positions to hear how they explain the decision to themselves and their families back home. Interviews trace what draws each of them in, from ideology and boredom to a search for purpose or redemption, and the footage doesn't flinch from the risk and disillusionment that follow. Rather than treating the volunteers as either heroes or fools, the film lets their own contradictions sit on screen, building a portrait of a hard question: what makes ordinary people put on a uniform for someone else's fight.