Having reached a certain level of development, science solves the problem of time travel using the colossal energy of a supernova explosion. Mankind creates a structure, calling it “Eternity”, which includes specially trained and selected people from different centuries, who made a vow of celibacy. The task of “Eternity”, headed by the Council of Time, is to adjust the fate of mankind, which in its path is constantly sliding to self-destruction. The harsh and ascetic laws of "Eternity" are debugged and never fail. But one day, the young and brilliant Technician Harlan, having made one of the movements in time, falls in love with a beautiful girl Noyce from another century. Love turns his head, shakes his foundations .. Harlan is faced with a choice duty and obedience to the law or personal happiness? His decision can lead to the paradoxes of time and even the disappearance of the “Eternity” itself.