Five-year-old Xiao Bei is familiar with the sea and extremely sensitive to the movements of fish schools in the sea, yet was left alone on a desolate island by his biological parents. Impoverished fisherman Xu Haisheng accidentally rescues the helpless Xiao Bei, and despite his straitened circumstances, resolves to take good care of the child. The kind and assertive Lin Chunyan sympathizes with Xiao Bei's encounter and chooses to join hands with Xu Haisheng. The three of them successively face neighborhood disputes and family entanglements in their daily lives, guarding and healing each other. Under the warm companionship, Xiao Bei slowly opens his heart, and the family relies on diligent labor to strive to manage their ordinary and happy life.