The identity of the assailant who stabbed 22-year-old Maurice Skeen during a street altercation in Albany, New York, remains unknown. With almost no physical evidence, detectives must decipher the digital to identify the criminal.

When widow Valena Shepherd is found dead at home, police suspect foul play. Investigators follow digital clues that suggest Valena knew her killer and hope the data contained within a digital heart monitor device pinpoints the perpetrator.