Tess loves all things true crime. Upon graduating from college with a degree in journalism, she gets a job working for a newspaper. Her goal? One day to become a famous investigative reporter. After listening to a podcast about a serial killer on the loose in California who targets couples and leaves behind bloody folded paper hearts, she is instantly intrigued. She meets Becky, a fellow true crime lover, and together they investigate this unsolved mystery to try to learn the truth and launch Tess' career.