The world where trains live is riddled with railways, tunnels, bridges so that trains can safely travel about their business to solve problems and just live. But once the incredible happened - all the tunnels were blocked. This paralyzed the lives of all inhabitants and they turned to a group of special trains that, by transformation, can become robots and move not only along the tracks. The fastest blue robot Kay must rush along the road with a mass of obstacles to find the key that unlocks all the tunnels. Help him in the game Robot Trains S2 to quickly get to the goal.