In this thrilling adventure, four boys are immersed in an intense war game, using an abandoned bus nick-named "Cool" as their headquarters. Their mission is to infiltrate a Nazi stronghold and liberate innocent civilians.

But as they play, something strange happens - the line between fantasy and reality begins to blur, and the boys find themselves transported to 1943, Nazi-occupied France. With danger all around, they must confront the question: Is this just a game, or are they truly part of a historical battle for freedom?

The boys must navigate the harrowing realities of war and decide how far they're willing to go to complete their mission.