After being laid off by a major corporation, Lu Zihang returns to his hometown and accidentally activates the "Ocean Tide System," gaining the ability to see through seafood and contract marine life. Using this, he catches rare seafood, rising from a mocked, down-and-out youth into a master beach comber. However, his greedy second aunt's extortion, local fish tyrant Li Fulong's aggressive suppression, and businessman Sun Jianye's step-by-step coercion come one after another in waves of provocation. Lu Zihang fights back strongly with hardcore methods, and even rescues Su Moya who accidentally falls into the water in the deep sea, leading the two to go through adventures side by side and deepen their bond. Under the system's blessing, he guards his homeland and the person he loves, while gradually uncovering the shocking secrets hidden deep in the ocean.