As soon as the main characters got out of the terrible nightmare, mercenaries were on their trail. They know about the secret activities of the mothballed Gamma-3 laboratory complex, which Colonel Zimin was so persistently searching for. But the mercenaries have no information about his exact location. The last thread leads to Maxim and his friends. Max himself is under the influence of an experimental serum that was injected into him by the deceased Professor Germanov. The guy is haunted by strange visions and hallucinations. He suffers from sleep disorders. Does this make any sense? Maxim understands that the answers to the questions tormenting him are somewhere in the Gamma tunnels. He needs to go down to the research facility again. But will his friends go with him? How will Astra meet them after they stormed the pressure gate and flooded the tunnels, fleeing? Who or what will stand in their way this time?