A boy named Harley and his family attend a taping of The Banana Splits TV show, which is supposed to be a fun-filled birthday for young Harley and business as usual for Rebecca, the producer of the series. But things take an unexpected turn - and the body count quickly rises. Can Harley, his mom and their new pals safely escape? Young Harley is having a dream birthday; he and his family are going to watch the taping of his favourite show. But the dream becomes a nightmare when the animatronic stars turn homicidal.