Teenager Bo-Yan goes around his local village asking people if they need help for the harvest season. But with his parents on the run from debt, no one wants to be associated with him. Only his best friend Howai lets him help out at his family's fishery. Howai's father entrusts Bo-Yan with a key to an oyster fishing boat, which they will need the next day. But when he accidentally loses the key, Bo-Yan must make a desperate search to find it and prove he's worthy of trust.

The story revolves around a teenage boy's struggle to find a sense of belonging. A simple storyline and symbolic rural locations are used to depict his growing pains in plain and earnest terms. The ramshackle fishing village, its banal lives and the boys’ fragmented conversations all contribute to Bo-Yan's restlessness and intensify his confusion. Shot entirely in the director's hometown, Yunlin, the film's realism is given a post-apocalyptic twist as tombstones and electric poles appear half-submerged in water as the reality of the area's worsening seawater intrusion subtly invades the story.