Master Tiger (Starring Rexen CHENG), a Taoist god, seals the demon in the body of a fish. However, a small fish jumps out of the body, and a boy (Starring WU Zhi Xuan) brings it home. After that, a series of weird incident happened, especially the strange behaviour from the boy’s mother (Starring Vivian HSU). In order to save his mother, the boy seeks help from Master Tiger, but no one knows that there is a bigger danger in behind...