Music composer Lu Yao is at the peak of his career when a brain tumor surgery leaves him with anterograde amnesia. His memory resets every day. He can only recall past information before the surgery but not new events. His new therapist Xu Xingyue uses sensory stimulation to enhance his short-term memory. Gradually they develop a bond and collaborate to write a song. When his over-protective sister finds out about their relationship, she forces Xingyue to break up with Lu Yao and eliminates every trace of hers from Lu Yao’s life, Although Lu Yue can no longer remember Xingyue, he feels a sense of loss. When he stumbles on her photo, his friend Buddy finally spills the truth. The two reunite at a concert. As they vow never to leave each other again, what does the future hold for them?