The Alden children suspect that the other guests are somehow involved when things begin to disappear at the bed and breakfast where they are staying in Washington, D.C.

Los hermanos Alden pasan las vacaciones de verano en su propia isla privada. Allí conocen a un misterioso nuevo amigo, �con un fascinante secreto!

The Mystery of the Lost Mine: On a camping trip to Arizona with their grandfather, the Alden children search for a lost gold mine. The Guide Dog Mystery: When they help out at a guide dog training school, the Alden children meet several people who seem obsessed with a particular dog named Ginger. The Hurricane Mystery: While visiting a friend of their grandfather's on Sullivan's Island, the Boxcar Children encounter mysterious activities related...

When Henry's magic teacher, The Amazing Arthur, goes missing right before the Greenfield Magic Shop's annual magic show, Henry and his sibilings look into Arthur's disappearance.

While visiting an old mansion, the Aldens investigate the possibility that it may be haunted.