Red Rose follows a disparate group of teenagers, adrift in the long hot summer following GCSEs, hanging out on the Bolton moors with little sense of direction or purpose now that school is over. Rumours circulate of the Red Rose app, an urban legend that blooms on the smartphones of teenagers, encouraging them to undertake a series of challenges increasingly dangerous in its demands. On the fringes of her group of friends, Rochelle Jackson downloads the mysterious app, naively inviting darkness into her life. What she sets in motion is a series of events that take the town by storm, and bring the friends together to battle the unseen forces of a seemingly supernatural entity.