Twins Mattie and Mark Miller are as different as night and day. Mattie is ticklish; Mark isn't. Mattie loves dogs; Mark loves cats. Mattie is serious; Mark is a practical joker. (And that isn't even the half of it!) It seems there isn't anything these energetic nine-year-olds can agree on. When their disagreements begin to cause big trouble in their Holmes County, Ohio, Amish community, will Mattie and Mark call a truce before it's too late?