On the edge of the inhabited sectors of space appeared the ancient dreadnought "Primos," which was considered missing many years ago. GBS - Galactic Security Service, received a strange Psi signal, which turned out to be stronger than anything they had observed before. What is it: an ancient prototype of Psi-weapons, or a trap of hostile races during the heating up of the situation in the galactic arena? The strongest Psionic and, practically immune to Psi-influence, his partner is the Epsilon Group. They are obliged to solve this riddle.