When Ahab and his friends find a bullfrog in their town — a real, live bullfrog, possibly the last bullfrog in North America — they have several options:
A. Report it to the Environmental Police Force. Too bad everyone knows they're a joke.
B. Leave it be. They're just a bunch of kids — what if they hurt it by moving it?
C. Find another real, live bullfrog on the black market. Convince their parents to let them bike to Canada. Introduce the two frogs. Save all of frogkind.
Ahab convinces the rest of the group that C is their only real option. Because if they don't save this frog, who will? Their quest, which will involve fake ice cream, real frog spawn, and some very close calls, teaches Ahab that hope is always the logical choice, and science is always better with friends.