Beth and her cousin Patrick travel in Mr. Whittaker's invention, the Imagination station, to 1000 A.D. Greenland, where they meet Erik the Red and Leif Eriksson and witness the spread of Christianity in that country.
Patrick and his cousin Beth travel back in time to ancient Rome, where they meet Telemachus and help put an end to the spectacle of gladiators fighting to the death.
Cousins Patrick and Beth travel in Mr. Whittaker's invention, the Imagination Station, to thirteenth-century China, where they meet Marco Polo and Kublai Khan and are mistaken for Christian shamans.
Eight-year-old cousins Patrick and Beth find themselves in 1450's England during the War of the Roses, where they discover the missing treasures and meet the person who has been sending notes through the Imagination Station.
Mr. Whittaker uses the Imagination Station to transport cousins Patrick and Beth to the Holy Land in 1000 B.C., where Hugh is trying to change history by helping the Philistines defeat the Israelites.
When time-traveling cousins Patrick and Beth use the Imagination Station to go to Plymouth Colony in 1621 hoping to find Hugh and return him to his own time, they meet William Bradford, Myles Standish, and Squanto.
