The Other Side of the Door, Maria and Michael, who have a happy life with their son and daughter, lose their little boy in a tragic accident. Unable to ease her pain, the mother learns about an ancient temple where she can perform a ritual to bring her son back for one last goodbye. However, this temple is actually a mysterious portal between two worlds, and when the mother disobeys the sacred warning of "Never open the door!", the balance between life and death is disturbed.