The gang has trouble on the water as Bill, Circus and Little Jim are caught in a flood of Sugar Creek, then Poetry, Dragonfly and Bill are canoeing on Pass Lake, Minnesota when a big storm hits.
Neither the return of Big Bob Till, Dragonfly's report that his mother saw a ghost, nor a mysterious note warning that a cave is haunted will keep the gang from spending a night alone there.
Thanks to Old Man Paddler the gang is off to Chicago, where they minister at a rescue mission, perform on the radio at Moody Bible Institute, see the sights and have a run-in with Bob Till.
Scruggs Grady is close to having his dream come true -- a home of his very own, with his own mother! But disaster strikes when a mysterious aunt pops up and whisks him away to San Francisco. To muddle things even more, a secret note warns him to beware of the "Juggler."
Traveling with Dr. Iris Perez to Iceland to investigate activities attributed to local superstitions, the Alden siblings learn the legend of the mischievous huldufolk elves before uncovering clues that offer scientific insights into the strange phenomena.
Learning about paleontology and fossil hunting under renowned scientist Dr. Iris Prez while attending summer camp in Colorado, the Aldens investigate an outbreak of strange events that local superstition attributes to a bigfoot creature roaming the valley.