Olive is the most unlikely of secret agents, a professional assassin in her sixties who's known only as "The Knit Lady." She begins her trade by killing the Italian mobster who'd cheated her late husband, and then is quietly recruited by "The Brokers." Now she's hired to kidnap and kill retired British agent Benjamin Scarlatt. But The Knit Lady has scruples, and when an Islamic terrorist group takes control of the cruise ship on which both she and Scarlatt are traveling, she decides to fight back, with knitting needle, scalpel - and plastic explosives. Don't underestimate Little Old Ladies - they're the most dangerous ones of all!