The winter sports season is here, and the Aldens are excited about all the snow activities, especially snowboarding, but soon they find themselves in the middle of a mystery surrounding a star athlete and a stolen snowboard.
While spending two days touring a zoo to see the baby animals, the four Alden children, aged six to fourteen, help catch an escaped monkey, participate in a photography contest, and investigate a missing camera.
While visiting a recent purchase of Grandfather's, a ghost town in the Rocky Mountains, the Aldens encounter a mystery involving a run-down motel and a woman who may be a ghost.