 This is a chance for Weak races to improve their positions... but also a threat for Earth, since on receiving the information the Strong races would destroy it to prevent its possible alliance with a biologically-identical race.A conspiracy of four races decide to carry out a reconnaissance mission.Pyotr Khrumov agrees to enter a symbiosis with a Kualkua, who morphes him to appear as the dead pilot, gives him the language of Geometers, and temporarily erases his memory...

By struggling to find allies Pyotr will explore two worlds