On the third day of his campaign, Bakker did the impossible and unforgivable in order to have time to prepare for a meeting with the great Barbarian - a cosmic being of unknown origin, whose tomb is located on the other side of Celestine, the dead satellite of the planet Coma. For the sake of defeating this common enemy, former friends, and now sworn enemies, are forced to unite and join Bakker. But it did not help. Later, with the help of an unexpected ally on Celestine and the ancient Remnant, Lyuba and Nastya, in a desperate attempt to change the tragic outcome of the unequal battle with the Barbarian, find themselves in a time loop. Forced to return again and again to that very third day, despite serious disagreements and internal conflicts, they make terrible sacrifices for the sake of humanity, which, in any case, will never know about their feat.