Cornelius is a genius inventor who lives completely off the grid. When he learns that his adult daughter has died he is shocked, but even more so when he learns she had a son -- and now he has to take care of him. Mortimer, a proper and lonely boy, moves in with his crazy grandpa. Will the two opposites balance each other out, or wreak havoc in each other's lives? #grandpa #genius #boys #crazy #challenge