This drama tells the story of an older brother, Jinren, and his autistic younger brother, Meiluren, who depend on each other for life.Cooperating with Meiluren, who can live a trouble-free life as long as he sticks to a fixed schedule, Luren lives a stable and uneventful life.One day, a little boy calling himself “Lion” suddenly appeared next to them, and they had to take him in, and the story begins.

Although they were still not used to it, in the process of living with “Lion” and the other three, the brothers understood that the background of his foster care was related to “a certain incident”. From then on, their peaceful days began to be swallowed up by a stormy whirlpool.