Jiang Yisheng is a patient with bipolar disorder. When he was eight years old, his mother was seriously ill. Jiang Yisheng was sent by Father Dog to the home of He Shichen, the son of his mother's deceased best friend who had just grown up. Because of Jiang Yisheng's illness, he studied psychology after college. Seeing that Jiang Yisheng was recovering from his illness, he lost his memory due to some things.
Purpose: Mutual redemption