A Vigilante is a 2018 American crime drama film written and directed by Sarah Daggar-Nickson in her feature directorial debut.

Wilson, Tonye Patano, Chuck Cooper, Betsy Aidem and Judy Marte, the film follows Sadie (Wilde), a woman who makes it her life's mission to help victims of domestic violence break free from their abusers.

[2] She struggles with money, asking for whatever the people she helps can give and attempting to redeem a life insurance policy on her still-missing husband.

After Sadie works out and disguises herself with latex makeup, contacts and a wig, she is invited to the home of Andrea and Michael Shaund, claiming that she needs to conduct a health insurance assessment.

In a flashback, Sadie finally opens up to her therapy group about her past, revealing that her husband, a brutal, manic survivalist, tried to force her and their young son, Cody, to move out of their home and live off the grid together.

After Cody's murder, Sadie entered a shelter for domestic violence survivors where she found a book on Krav Maga which sparked her interest.

The website's critical consensus reads, "Led by Olivia Wilde's fearless performance and elevated by timely themes, A Vigilante is an uncompromising thriller that hits as hard as its protagonist.