Freshman Lin Chuan could not afford his tuition due to family poverty when starting university, but unexpectedly awakened the Ocean Illustrated Handbook system, which can identify seafood and gain marine creature abilities. While beachcombing to make money to treat his injured father and support his family, he studies at Ocean University and confronts the bullying of rich playboy classmate Zhao Tianhao. Later, while going out to sea, he encounters a sunken ship with national treasures, devotes himself to marine cultural relic protection, grows into a young marine practitioner, and is accompanied all the way by Chen Qinglan and Su Wanqing.