It's a week since the end of the Kree/Skrull war, and the Avengers, this issue led by Vision, are worried about the missing Clint Barton. He abandoned the source of his Goliath power in #94, but in #96 went to stop a Skrull spaceship from blowing up the Earth. As Iron Man says, the Earth's still here so he must have succeeded, but is he dead?
Thor leaves for Asgard to use Asgardian magical devices to search for him. Iron Man heads off to use some of Tony Stark's advanced technology for the same purpose. Captain America, Quicksilver, Scarlet Witch, Vision and Rick Jones stay at Avengers Mansion to use more conventional means. (SHIELD is also looking.)
Meanwhile out on the streets Mr Tallon, leader of the Warhawks, is stirring up hatred against a Chinese delegation to the UN, with the help of cloaked characters playing pan-pipes. Leaving behind Vision to coordinate the search for Clint, the other Avengers break up the riot. But the music of the pipes fills them with hate too.
Thor returns to the mansion because the way to Asgard is blocked. He and Vision then discover that Iron Man is in the sway of the Warhawks too. Vision resists the urge to rush to Wanda's side, and instead sends Thor there while he goes to Stark's lab.
Vision and Iron Man engage in a typical hero vs hero battle, which ends when Iron Man knocks Vision into the cloaked piper accompanying this bunch of Warhawks, accidentally killing him. Iron Man and the Warhawks then come to their senses.
Meanwhile Thor recognises Mr Tallon as Ares. He digs a trench to surround the rioting mob, including the Avengers. Vision and Iron Man arrive, but Iron Man falls under the spell again. Ares pits the rest of the Avengers against Thor and Iron man, and Scarlet Witch traps Thor's hammer in a hex sphere.
But before Thor can revert to Don Blake, his hammer is freed by an arrow. Vision KO's the pipers, who turn out to be goat-hooved creatures. Their spell dissipates as before, and Ares beats a hasty magical retreat.
The archer who saved them was of course Clint, now returned to his old identity of Hawkeye (but dressed in medieval fantasy style). And he's brought an amnesiac Hercules with him, mouthing a prophecy that Ares will conquer Earth and Asgard.