A sudden accident at sea causes childhood sweethearts Xia Wanxing and Lu Chenzhou to switch bodies. When the body of a business elite lives in the soul of a pet doctor, and the body of an ordinary girl hides the secret of a sick and frail CEO, the misplaced identity becomes the cruelest joke played by fate.
They clumsily tested under the skin of strangers and protected each other in the surging undercurrent of life. However, in the growing love, they were shocked to realize that Lu Chenzhou was already terminally ill, and the body swap was accelerating the countdown to death. After a car accident, Yin and Yang were separated. Xia Wanxing was still alive with her lover's identity. Family suspicion, fiancée's accusations, and business rivals' difficulties came flooding in. Her body even began to suffer from Lu Chenzhou's symptoms.
When all memories became sharp blades, when life was more painful than death, Xia Wanxing finally chose to return to the seaside where the dream began. The waves surged, drowning the two names that had been entangled for half their lives, leaving only an unspoken "I love you", which will forever be a regret for the rest of their misplaced lives.
