Suicide Squad follows the events of Batman v Superman: Dawn of Justice, and takes place in a post-Superman world where the government tries to determine how to respond in the event that an alien with more villainous intentions visits Earth. Ruthless intelligence officer Amanda Waller (Viola Davis) offers to recruit society’s worst criminals, those possessing lethal skills and superhuman powers. Her first target: the possessed archaeologist June Moone/Enchantress (Cara Delevingne).
When Midway City is threatened by a powerful mystical enemy, Waller’s plan gets the go-ahead. She cuts deals with the whole squad of prisoners: Deadshot (Will Smith) gets his Second Amendment rights reinstated, Harley (Margot Robbie) is set free from her cage, Diablo (Jay Hernandez) steps out of his fireproof prison, Boomerang (Jai Courtney) and Slipknot (Adam Beach) each get to wield their signature weapons once more, and Killer Croc (Adewale Akinnuoye-Agbaje) emerges from the swamp. The only condition is this: Obey orders or die. This is strictly enforced by squad leader Rick Flag (Joel Kinnaman), the samurai Katana (Karen Fukuhara), and of course the explosive devices – developed by Wayne Enterprises – inserted into their necks. However, the arrival of the tatted-up Gotham City mega-criminal, the Joker (Jared Leto), might doom the mission thanks to his plan to reunite with his true love, Harley.