The tagline for the 2018 film Peppermint is "The System Failed, She Won't." The phrase captures the movie's revenge premise: when institutions fail to deliver justice, its protagonist decides to take matters into her own hands.
Jennifer Garner plays Riley North, a mother whose husband and daughter are murdered in a gang-related attack. After Riley survives an attempted cover-up and sees the legal system fail to punish those responsible, she disappears and spends years preparing for revenge. She later returns to Los Angeles as a highly trained vigilante.
The film was directed by Pierre Morel, who also directed Taken, and written by Chad St. John. The title refers to the peppermint-flavored ice cream Riley's daughter enjoys, making the sweet word an ironic contrast with the film's violent action. The missing word is "Won't," not "Will": the tagline promises defiance rather than cooperation with a broken system.