Modesty "Mo" Tarleton has a dream: to own the world's first airship café. Her children have their doubts, but she's determined to make it work. Who wouldn't want to have a coffee and cakes while soaring through the clouds?

However, there's something bizarre about Mo's new business. In the corner of the café, there's a mysterious wardrobe—a portal to other worlds. Whether she likes it or not, Mo's café will be the new home of some rather paranormal guests, including a mermaid, a zombie, and a handsome cowboy with a secret.