The gang decide to go traveling in the Mystery Machine, seeking fun and adventure during what could possibly be their last summer break together. However, havoc-wreaking monsters seem to be drawn to them, appearing almost every stop of the way.

The gang decide to go traveling in the Mystery Machine, seeking fun and adventure during what could possibly be their last summer break together. However, havoc-wreaking monsters seem to be drawn to them, appearing almost every stop of the way.