Introduction: Due to changes in ocean currents, shark activity has appeared near a diving area, but the traces are unknown. Hungry sharks are ready for a ruthless slaughter. Doctor Shen Xin was invited to his cousin Liu Yiran's birthday party, but was involved in an emotional farce between his cousin's boyfriend Zhou Tianming and his female boss He Wendi. As everyone knows, the four people strayed into the place where the sharks were haunted, and the bloodthirsty hunt was staged. In order to save everyone's life, Shen Xin launched a desperate battle with the bloodthirsty shark, fighting the sea of sharks.