The Tag-Along: Devil Fish
Wanting to rid a haunted house of its spectres, a medium is called in to dismiss them. He proceeds to seal them inside a fish and the haunting stops. One summer, a group of kids go fishing at the river during the school holiday. They unknowingly catch the demon fish that the medium has used. Since then, the spectres are released back into the world and their evildoing begins again.
Vivian Hsu, Jen Shuo Cheng