A hero called the legendary third baseman in the former prestigious grass baseball team "Peanuts", will start to rebuild the peanuts that have now turned into weak teams from the outset. Peanuts are going to fight against the team of strong teams, taking advantage of the redevelopment of the city where Captain Sagara lives.

Snoopy embarks upon his greatest mission as he and his team take to the skies to pursue their arch-nemesis, while his best pal Charlie Brown begins his own epic quest.

To celebrate the 50th anniversary of the moon landing, this documentary tries to solve the great mystery: Was Snoopy a top-secret astronaut?