Some people collect stamps. Jess Simons collects hearts. By day, she's a legal operations specialist helping abuse survivors navigate a justice system that rarely delivers justice. By night, she finishes the job. With the help of a hacker, a forensic cleaner and a shipping container she affectionately calls The Box, Jess has perfected murder into something almost efficient. She has rules. She has routines. She definitely doesn't have feelings.

Then she meets Jake. Jake is kind. Clever. Completely unprepared for the fact the woman he's falling for spends her evenings dismembering society's worst people. Unfortunately for both of them, that's not even their biggest problem. Someone knows exactly who Jess is. Now Jess has to stay one step ahead of a person obsessed with revenge, and the one man who looked at her like she wasn't a monster. Turns out, love is a lot messier than murder.