While the government is not clear how to respond to an alien visiting Earth with evil intentions, Amanda -The Wal- Waller (Viola Davis), the leader of the secret agency A.R.G.U.S., offers a curious solution. This official US intelligence believes the answer is to recruit the most ruthless villains, with deadly and magical abilities, to work for them.
Initially the program will not get the green light, but when a powerful and mystical enemy threatens Midway City, Waller decided to group his team of prisoners. Thus gathers archeologist June Moone / Echantress (Cara Delevingne), Deadshot (Will Smith) recovers its rights of the Second Amendment, Harley Quinn (Margot Robbie) is carefully released from its cage, Diablo (Jay Hernandez) is released from his fortress of solitude own fire test, Boomerang (Jai Courtney) and Slipknot (Adam Beach) recover their weapons, and Killer Croc (Adewale Akinnuoye-Agbaje) out of its morass.
After being imprisoned, the seven most dangerous supervillains of the world agree to collaborate with the government in dangerous secret missions to achieve clear your record. Together they are called Suicide Squad for the risk of the tasks they will face. Now have to obey orders or die, something that will force them to comply Rick Flag (Joel Kinnaman), his samurai Katana (Karen Fukuhara) and carrying explosives implants inserted in the neck, courtesy of Wayne Industries.
But besides watch the explosive and ungovernable Task Force X, Waller will face more problems because a new criminal will soon enter the scene. And the villain most wanted Gotham City, the Joker (Jared Leto), is determined to fulfill its own plan regardless: back his one true love, Harley Quinn.