Nergal is a beautiful night planet. Life here wakes up in darkness, and the day is full of nightmares. But people found a place for themselves even in this strange world, founding a magnificent colony. They invited the space fleet to their territory - and negotiations on cooperation began... Now the Northern Crown team is assigned to Nergal. Not to establish contact with the colony, but to determine who destroyed the negotiators and punish the killer without becoming new victims.