Agent "Perfecta"

Code-name: "Perfecta". Nobody has ever seen her and tells a story about it. She is in the field for more than 15 years, the best assassin for any job. She never failed a mission or job. She is simply the best, the legend. She is now retired and enjoying her well earned money but she got call for a mission she can not refuse. She vs "sniper squad" of female assassins. They offer her backup for a mission but she refuse with a laugh and says: "I work only alone, anyway they would just slow me down anyway" and she laugh again. The mission has just begun now.....