She is sent to Seattle to deal with a new "Errand". The new Errand is Henry Callahan who is her ex and the reason why she is doing this job in the first place. She is in for revenge.
But I'm guessing things are not what they seem.
So I messed up. I read this one first not knowing it was a series (my own fault for not checking goodreads first). It is a novella/serial. The characters are interesting and I'm hooked. The only thing about this type of books is the they feel so short and you are left wanting more.