It's the day after Halloween in 1988 when four young friends accidentally stumble into an intergalactic battle and find themselves inexplicably transported to the year 2019. When they come face-to-face with their adult selves, each girl discovers her own strengths as together they try to find a way back to the past while saving the world of the future.

A group of friends beaten down by adulthood gets a chance to relive their glory days when a night of hard partying in a hot tub sends them back to 1986.