Vortex to the Ojibwa

When the internet connection fails at their grandparent's cottage, Theresa and her book smart brother Bobby are forced outside. Distrubing a hornet's nest, the teens fall into a cenote and time travel to an Ojibwa encampment where Theresa finds love and Bobby aids their new friends. When the two venture where they shouldn't and interfere with fur trading, they put their lives in danger as well as those of the Native Americans. The teens need to use their twenty-first century smarts in order to return to safety.