When Dante's brother, James, seeks the team's help to clear his client's name in a shooting, they uncover a plot to bomb an international anti-terrorism conference. Meanwhile, Delilah gets ready for prom and learns she has been accepted to UCLA.
Robyn McCall, an enigmatic woman with a mysterious background, uses her extensive skills to help those with nowhere else to turn. McCall comes across to most as an average single mom who is quietly raising her teenage daughter. But to a trusted few, she is "The Equalizer" - an anonymous guardian angel and defender of the downtrodden, who's also dogged in her pursuit of personal redemption.