A reckless young mouse named Ralph makes friends with a boy in room 215 of the Mountain View Inn and discovers the joys of motorcycling.

At Greenglass House, a smuggler's inn, twelve-year-old Milo, the innkeepers' adopted son, plans to spend his winter holidays relaxing but soon guests are arriving with strange stories about the house sending Milo and Meddy, the cook's daughter, on an adventure.

Spring is here and the animal staff at the Heartwood Hotel are busy arranging a series of festivals and competitions to drum up business and to show its patrons that Heartwood is the greatest hotel in Fernwood Forest.

The peaceful winter that Mona the mouse expected at the Heartwood Hotel is disturbed by a difficult guest, food shortages caused by a huge blizzard, and secrets.