Charlie and her grandfather Sal are worried about the ghost because it’s chasing tourists away during the summer high season and ruining their island carriage business. When Sue and Sal meet cute (grandparents in love, ugh!), Mia and Charlie are forced together. They decide to team up to find and capture the ghost – to save Sal’s business and Mia’s shot at independence.
Mia and her grandmother Sue are about to enjoy six whole days at Grand Hotel, a fancy resort on Mackinac Island in Michigan. If only a possible ghost haunting doesn’t ruin the first trip Mia has ever taken away from her clinically anxious and overprotective mom. Because if there actually is a spook, Mia will have to end her vacation early, losing her chance to stand up to her mother and live her own life.