"The Lighthouse by the Island" tells the story of young Jiang Xiaohai who was forced to return to his hometown of Wangyu Port after being frustrated in his struggle in the city. In the salty sea breeze and the silent company of his grandfather, he gradually took over the ancestral lighthouse repair shop. By repairing fishing gear and electrical appliances, and participating in sea rescue, he got to know this familiar yet unfamiliar sea again. While getting along with the tough grandfather, the kind-hearted Dr. Lin, and the simple fishermen, Jiang Xiaohai repaired the damaged utensils and sutured the cracks in his heart. Finally, he found the true direction of life in the rusty parts and the eternal light of the lighthouse. This is a heart-warming story about return, growth and protection, exploring how hometown can become the final harbor to heal wandering souls.