While sorting old medical records in the pharmacy department of the city's No. 1 Hospital, Su Wei unexpectedly discovers something suspicious in a heart surgery record from seven years ago. When she tries to uncover the truth, she runs into Lu Chengyu, a cardiac surgeon newly returned from abroad. The man who left a deep mark on her youth has now become the biggest obstacle to exposing the secret. As the investigation deepens, buried misunderstandings, deliberate concealments, and restrained feelings intertwine in the hospital corridors. When an old truth meets a love that still burns, can they get their heartbeats back in sync to the ticking of a stethoscope?
