Olive and her adopted siblings Charlotte and Darwin are spending the summer with their estranged grandma at her creepy hotel and it’s all work and no play. They’re stuck inside doing boring chores but they soon stumble upon an incredible secret… Behind each room door of the hotel lies a portal to a different strange and mysterious place. The simple turn of a knob transports them to a distant magical world filled with space pirates. Behind the next door are bearded wizards. Down the hall is a doorway to a cotton-candied kingdom. But once the doors are opened, worlds start colliding, and only one family can save them before they tear themselves apart.