Hooray, it's summer vacation again, and the Bellinga family has super fun plans! They have a vacation home at a super cool amusement park and get to try out all the rides. However, the Bellingas don't have much time, because the kids have to rehearse for the park show, and dad Daniel is training for the Summer Games, where he could win the "coolest dad of the year" award. Meanwhile, they also have to look after the director's dog, which is no easy task. When two well-known criminals suddenly show up at the park, chaos erupts, and the Bellingas find themselves in a crazy chase.

On the night before Halloween, security guard Wiebe and his crew are assigned to watch an empty amusement park. Little do they know, they are not alone.