The war with Concordia has just died down and peace has reigned in the Galaxy. But for how long? The 12th Guards Tank Regiment, in which the guard company is commanded by Captain Konstantin Rastov, was suddenly alerted. The task is to land on a gloomy planetoid and, together with the military space forces, attack the base of the Concordian rebel starships, which refused to surrender along with the rest of the fleet. T-14 tanks are designed to fight in atmosphereless planets, but no one has ever taken them into battle against starships! Will the equipment hold up? And most importantly, will people survive? But the main questions will come later, when it turns out that the enemy was hiding something very important on the planetoid, and alien invaders stretched their claws to the key planets of earthlings...