To save her seriously ill father, fisherwoman Li Siyue takes up his legacy and heads out to sea to fish. Chen Huanwen, the younger brother of a powerful CEO, forcibly recruits the local fishermen, giving them three days to retrieve the Seven-Colored Golden Pearls from the sunken ship An Yuan. Otherwise, he threatens to slaughter the entire village. Li Siyue bravely steps forward and accepts the three-day challenge. Armed with the nautical chart passed down by her father, she ventures into the sea despite a raging storm. At Whale Bay, a giant whale swallows her and her boat whole. Trapped in a desperate situation, she discovers the scattered treasures of the shipwreck, including the Seven-Colored Golden Pearls, which have been lost for thirty years, inside the whale's stomach. When the whale feeds again and seawater surges through its stomach, she climbs to an old wound and cuts her way out with a dagger. With the golden pearls in hand, she saves the entire village. She also personally brings the truth about what happened thirty years ago to light and finally obtains justice.