Having experienced three lifetimes, the genius songwriter Lin Yunyi opens his eyes only to find he has mere days of lifespan left, trapped in the desperate plight of terminal illness. The popular actress who has accompanied him since childhood remains steadfast, guarding his bedside to face life and death together. Dragging his ailing body, he picks up the pen to create, healing countless strangers with melodies while carving out a glimmer of life-extending light for himself. In the days of counting down life, the two hide their full hearts of reluctance, guarding each other silently, and boil down the limited time into the most touching and gentle emotional bond.