A man she loved and the man she loves both promised to love her for a lifetime. But only one will fulfill his promise. Because she found a secret that one of them would kill to keep hidden... Katherine Esther Gomez is one of the best secret agents of the elite special forces organization called Guardians. She is trained to maim and kill if needed. But her heart is too soft when she's in love. Torn between her first love who left her and her bestfriend who's always by her side, she has to choose wisely... Because one is willing to die for her, while the other is intent on killing her... Would her lover be her killer?