When Annie tells him about her missing painting, Nate the Great and his trusted companion, Sam Spade, set out to investigate, gather clues, and solve the mystery.
Relates the exploits of the four Alden children as they locate a missing man. The Boxcar children are determined to solve the mystery that surrounds an old yellow house on their grandfather's property. Strange things have happened in that house where long ago a man disappeared.
The Boxcar Children are vacationing on an uninhabited South Seas island, but soon suspect that someone else may be there too-- someone who may not want them around!
The Boxcar Children are spending the summer in a remote fishing village on the New England coast, where they try to find out the secret of a suspicious man snooping in the village library.