Wonder Woman is a Marshal, Booster Gold is a Maverick-style gambler, and Wally West is an outlaw, wrongly accused of the death of Barry Allen.
Maxwell Lord is the villain, prefiguring his eventual unmasking as a criminal mastermind out to destroy meta-humans in actual DC continuity years later.
She vows to avenge Paradise's townspeople and asks for the help of Wally West, the Kid Flash, a gunslinger with above-average reflexes; and Katar Johnson, a Cheyanne Indian warrior also known as "Hawkman", who can fly with artificial wings.
On their way there, they are attacked by mechanical gunslingers sent by Lord and saved by Michael Carter, the Booster Gold, a mercenary outfitted with powerful guns devised by an eccentric inventor, Ted "Beetle" Kord.
As they near El Inferno, the Justice Riders are joined by J'onn Jones, an old friend of Diana's and an alien searching for Lord's "secret weapon".
Kid Flash decides to hide in Mexico, while Hawkman returns to the Indian reserve where he lives and Jones uncovers the source of Lord's advanced technology: a Dominion alien trapped in a cage.