The satellite photographed a fifty-meter creature in the Sea of Okhotsk. The government sends an expedition to search. Lika is a biologist specializing in the inhabitants of the Pacific Ocean and especially deep-sea creatures. She is excited about the unique opportunity to become part of the crew of the Yarina submarine, which is capable of diving to a depth of two thousand meters. But the girl’s joy is darkened by the fact that the head of the mission, Odintsov, is not only her former professor who stole her scientific work, but also her former lover. Will the Yarina crew be able to find a giant monster in the depths of the sea? What is creation? A bowhead whale or an incredible frilled shark? And will Lika, a painfully lonely person, be able to find a friend in this mission?