Gu Zi, a young man with an extremely dark childhood, met Su Xia, his first friend in his life. The agreement they made when they were children was forgotten by Gu Zi as he grew older. No matter how much he thought about it, he could not remember it. Gu Zi, who lost his parents, thought he could simply grow up in an orphanage, but the series of bizarre incidents made him feel strange. Weird cat demon, black skull, and baby doll. Various events are leading Gu Zi towards the truth. What did he promise to Su Xia in his childhood, what did the red knot on his wrist mean, and what did Su Xia hide from Gu Zi?
Purpose: Find the truth, accept the truth