Colonel Karen Harris runs a special unit set up by the European Union to combat human trafficking. An operation in the past against a criminal cartel called 'The Circle' Karen believed had been eradicated - hasn't! She had missed the Italian arm called 'Circulo'. Already this group is growing and causing considerable problems across Europe. Her efforts to bring Circulo down has become one of her most difficult operations to date, when not only had Circulo directed contract killers to assassinate her. Added to this an old adversary from the past, short of funds, is pitting Circulo members against each other and disrupting Karen's covert operation, leaving her floundering. The pressure is mounting for Karen, along with attacks directed towards her personally. One such action succeeds and she's in trouble when help comes from an unlikely source - a contract killer already contracted to kill Karen. Has Karen met her end when this time there seems no escape!