Brewster is an owlish, intellectual boy who lives in a fallout shelter of the Houston Astrodome. He has a dream: to take flight within the confines of the stadium. Brewster tells those he trusts of his dream, but displays a unique way of treating others who do not fit within his plans.

Benji gets lost after a flight overseas and becomes a stray in Athens, Greece. He then tries everyday to reunite with his family while mysterious people pursue him, in a race to get a code which was secretly tattooed on his paw at the airport. But who are the bad guys and who are the agents that can be trusted? Will Benji and his kids and their nanny ever get to enjoy their vacation?