Our contemporary Sergei Nikitin is fond of exits from his body and flights to his distant past, to his past reincarnations on Earth. Unexpectedly for him, during the next cast, he falls into his very distant past even before the incarnation on Earth - in the body of a reasonable reptile - pilot Zosan, who turns out to be an important participant in the events in the confrontation between the Empire and the space Horde attacking it.