Siblings Grant and Christina spend their summer vacation exploring the Great Lakes with their grandparents, Mimi and Papa, but along the way, the family encounters mysteries involving shipwrecks, haunted lighthouses, and island intrigue.
Siblings Grant and Christina embark on a journey westward aboard a covered wagon with their grandparents, Mimi and Papa, to follow the path of the Oregon Trail, but along the way, the family encounters a mystery amidst their adventure.
Christina, having discovered that the Liberty Bell hanging in Philadelphia's Liberty Bell Center is fake, convinces Grant and two other friends to help find the real one before the Fourth of July, sending them on an adventure into the past.
