As inventor Andy Brewster is about to embark on the road trip of a lifetime, a quick stop at his mom's house turns into an unexpected cross-country voyage with her along for the ride.As inventor Andy Brewster is about to embark on the road trip of a lifetime, a quick stop at his mom's house turns into an unexpected cross-country voyage with her along for the ride.As inventor Andy Brewster is about to embark on the road trip of a lifetime, a quick stop at his mom's house turns into an unexpected cross-country voyage with her along for the ride.