A woman grieving over the death of her fiance gets a mysterious phone call from him.

After Kevin finds a ghost named Ernest haunting his new home, he becomes an overnight social media sensation. But when Kevin and Ernest go rogue to investigate the mystery of the latter's past, they become targets of the CIA.

Dewey Finn, an out-of-work rock singer and guitarist, pretends to be a substitute teacher at a prestigious prep school. After identifying the musical talent in his students, Dewey forms a band of fifth-graders, in an attempt to win the upcoming Battle of the Bands contest.