Tosha can't wait to visit her cousin, Patty. The two ten-year-olds love to spend time together, even though Tosha has a way of getting them into some unusual situations This time is no different. Shortly after her arrival, Tosha persuades Patty to visit the old abandoned mansion located near Patty's house. Something draws Tosha to the run-down home, and she desperately wants to discover who lived there and what they were like. Patty thinks it's a spooky, dangerous firetrap, even so she agrees to help Tosha look for clues. But nothing could have prepared them for what they find: a diary hidden inside an ancient trunk in the attic. This is no ordinary diary. It has mysterious and amazing powers, and when the girls read the book, they travel to strange, faraway places with exotic animals, fascinating people, and exhilarating adventures. They also meet another ten-year-old girl, Emma, who accompanies them on their journeys. There's only one problem: they don't know how to get back home? Is there a connection between the old mansion, the diary, the trunk, and Emma? Tosha and Patty must solve the puzzle or risk being trapped within the powers of the trunk forever