To her peers, office worker Bonnie isn’t cut out for a high-powered corporate life. Sweet, bubbly, and a lover of all things feminine and cute, she hardly fits in. Little do her coworkers know, Bonnie had an unusual, isolated upbringing where her father taught her a very uncommon curriculum.

Then a late-night office attack reveals the unexpected: Bonnie is as sharp and capable as she is deadly.

Catching the attention of a secret organization of assassins called Fianna, she is recruited as an apprentice. Inspired by a group of legendary Irish heroes, the Fianna are a covert, highly trained group dedicated to defending the world from chaos. Through any means necessary. In this dangerous new world, Bonnie thrives—but she still hasn’t won everyone over. Ronan Clarke, the organization’s top operative, sees her as a joke. Forced to work together, Bonnie fights to prove herself to her cold new partner—no matter what it takes.