Failed London banker Max Skinner inherits his uncle's vineyard in Provence, where he spent many childhood holidays. Upon his arrival, he meets a woman from California who tells Max she is his long-lost cousin and that the property is hers.

Robert McCall is a former agent of a secret government agency who is now running his own private crime fighting operation where he fashions himself as "The Equalizer." It is a service for victims of the system who have exhausted all possible means of seeking justice and have nowhere to go. McCall promises to even out the odds for them.