

Fred and Sam, playing around with the ancient artifacts in Joe's father's office, accidentally transport themselves into the middle of a tribal battle in the African country of Angola in 1624 A.D., where they become slaves of Queen Jinga (who prefers to be known as King Jinga) and have a chance to explore the famous Kwanza River and witness a historic meeting with the Portuguese colonial governor.
Joe's uncle gives him a mysterious book for his birthday, but when his friend Fred wishes for buried treasure while looking through the book, Joe, Sam and Fred suddenly find themselves transported back through time to the year 1718 on a pirate ship captained by the infamous Blackbeard.
The boys are accidentally transported to the year 2105 when the boys are on a class trip to the Natural History Museum to learn about the inventions of the past. While there, they meet their great-granddaughters and get attacked by robots with ray guns.