Perfect Execution

Book 1/3 of the Perfect series

Alicia.
It plagues me, the promise I made with my three sisters. Yet we live in spite of it, waiting for a day to fulfill this promise. On a routine mission, I realised there was something equally important as my promise. This mission would be perfectly executed.

Iris.
That woman with a million personas that shift every waking moment of her life, intrigues me. My observations are never wrong, my deductions have always lead me to the right place. But why do they lead me to her this time?