Today is Coke and Pepsi McDonald's thirteenth birthday. Someone's out to make sure they never make it to thirteen and a half.
Racing across America, the twins will nearly be boiled alive in a huge basket of french fries, frozen to death by soft-serve ice cream, stampeded in a wild stadium riot, kidnapped from a high-speed roller coaster, and worst of all their parents think they're totally joking!
Will they survive? Will they defeat Archie Clone? Will they be dropped out of a helicopter onto the tip of the Washington Monument? Will they ever say "genius"?