This is a romantic story about popular actress Li Qin and beloved idol Wang Yibo. They first meet on the stage of Day Day Up, stirring subtle ripples in their hearts, then spend a wonderful time together at a hot spring resort as their feelings gradually deepen. Every moment between them, from their effortless teamwork during tapings to their passionate embrace beside the hot spring pool, is like a note sounding out a love song through the river of time. Beneath the spotlight, they face the attention and expectations of their fans, and together write a moving love story across the twin stages of romance and career.