Urban boy Zhou Yisheng was forced to move with his parents to the remote seaside town of Bianzhou, and he was full of resistance. He almost fell into the sea at sunset, but was rescued by a mysterious boy, only to receive a cold warning from him. After school started, transfer student Zhou Yisheng unexpectedly became the classmate of Hai tide, the boy who rescued him.
Haixi is the grandson of the lighthouse keeper. He is lonely and isolated by the whole school. Strong curiosity drove Zhou Yisheng to approach the "iceberg", but he inadvertently discovered the amazing identity that Hai Xi tried his best to hide - he was actually the legendary mermaid.
A bond that spans the forbidden sea and the thoughts of young people quietly grows in the salty sea breeze and the dim light of the lighthouse.
Concept: The deep sea of loneliness and secrets is finally illuminated by the lighthouse of understanding and protection