University student Tista appears to be preparing for an ordinary career, but in secret she is Sister Militia, a long-range assassin feared by New York’s criminal underworld and pursued by police. Extraordinary eyesight makes her deadly from distances others could not manage, while the life she wants remains increasingly incompatible with the work she performs. Meeting someone outside that hidden world forces Tista to consider whether she can protect the people she cares about without eventually exposing who she really is.