Proof of the existence of extraterrestrial intelligence is finally found - a gigantic alien spacecraft hovering inside a gas-dust cloud. Only one circumstance interferes with the triumph of earthlings - they are lost in the cosmic darkness and there is no way home. People are trying with all their might to establish contact with mysterious aliens, cherishing hope for the help of brothers in mind. But it is not known what secrets the brainchild of strangers can hide. No one knows what another mind can create with human consciousness, and what people themselves will create with...