Daredevil and Batman butt heads trying to spy on Catwoman swapping cases with a couple of thugs. They scuffle, causing Catwoman to flee without making the trade. They agree to work together but are foiled by Catwoman, who succeeds in making the trade with the person who hired the original thugs, Scarecrow.
Batman and Daredevil regroup at the Batcave where they ascertain their true target is Scarecrow, who was interested in the files on the Kingpin contained in the case. They follow the trail in the Batmobile while Scarecrow is busy using his mind control gas to take over a bunch of the Kingpin's thugs.
Batman and Daredevil continue to track Scarecrow's attacks around the city, eventually deciding to meet the Kingpin in hopes of finding Scarecrow. Kingpin gives them a tip, then tries to kill Batman and Daredevil in a helicopter while the two debate whether to follow Kingpin's suggestion.
Scarecrow is atop the Statue of Liberty waiting for the wind to shift to release his madness inducing gas. Kingpin shows up in his copter which Scarecrow blows up, with the Kingpin leaping on to the statue. Batman and Daredevil arrive by boat where Batman squares off against Kingpin and Daredevil versus Scarecrow. Daredevil being the man without fear is unaffected by Scarecrow's fear gas, eventually tying him up and halting the gas release. The Kingpin decides there is no reason for him to hang around with the Scarecrow vanquished, leaving Daredevil and Batman alone with the city safe.