On the eve of World War II, a British widow hires a self-taught archaeologist to dig up mysterious formations on her land, leading to a staggering find.

The true story of British intelligence whistleblower Katharine Gun, who prior to the 2003 Iraq invasion leaked a top-secret NSA memo exposing a joint US-UK illegal spying operation against members of the UN Security Council. The memo proposed blackmailing member states into voting for war.

Following Kick-Ass' heroics, other citizens are inspired to become masked crusaders. But Red Mist leads his own group of evil supervillains to get revenge, kill Kick-Ass and destroy everything he stands for.