The show is set in Bolton, England , and is described by its creators as a "love letter" to their hometown.
A group of teenagers celebrates the end of their GCSE exams when one member, Rochelle, downloads a mysterious app called Red Rose . The app promises to fulfill users' deepest desires but soon begins making lethal demands and isolating them from their peers.
The series explores the dark side of social media , teenage angst, grief, and the struggle of the working class in modern Britain.
The text you are referring to——is a typical file naming format found on Spanish-language media hosting and sharing sites. It indicates Season 1 of the British series Red Rose , specifically a version in HDTV quality with Spanish audio ("Castellano") .
The code is likely a shorthand for Chapter 1, Episode 5 (or potentially the 5th episode of the series overall), titled "Lockdown" . Series Overview