Orphaned delivery boy Kevin acquires indestructible avian armor and telepathic bird communication after consuming an irradiated poultry dinner, quietly defending Manhattan rooftops from masked felons. His humble existence implodes when his unfaithful girlfriend Amanda dumps him for Chad, a wealthy bully who fraudulently takes credit for Kevin's masked heroics.
Consuming experimental genetics serum out of raw vanity, Chad transforms into a bloodthirsty mutant rooster determined to terrorize the metropolis. As escaped supervillains overrun the bridges, Kevin commands flocks of city birds into aerial combat to neutralize his mutated rival and defend the city that never noticed him.
