The Deep is a place where terrible anomalies lie in wait for careless wanderers at every step, and mutants have long behaved like masters here. But these are not all the troubles that a simple stalker has to face every day. Alexey Izotov becomes the main suspect in a crime that he did not commit - the murder of a friend. By the will of circumstances, Alexey is forced, shoulder to shoulder with those whom he longed for revenge, to go through a difficult path full of dangers, to complete the task of the Armada, balancing on the very edge of the abyss, and at the same time to remain alive.