A passionate, all-consuming romance culminates in a shocking murder in an erotic thriller adapted from Catherine Ryan Howard's best-selling novel. Rooted in the present day as police investigate the discovery of an unidentified and intentionally decomposed body in an apartment, 56 Days flashes back the titular timeframe to the random first meeting of Ciara Wyse (Dove Cameron) and Oliver Kennedy (Avan Jogia) in a supermarket. They fall deliriously in love at frightening speed and eight episodes explore desire and betrayal in Boston from multiple perspectives, building to the reveal of whose body is lying on the floor of Oliver's home.