Channel 4's five-episode drama "It's a Sin" tells the story of three boys Ritchie (Olly Alexander), Roscoe and Colin in the 1980s. The plot will span 10 years. The three protagonists left their hometown at the age of 18 and came to London with hope and ambition. However, when they were infected with AIDS (there was a blood contamination case that year, causing a large number of people to be infected with hepatitis and AIDS), this disease, which was still full of rumors at the time, made them a threat and a terrifying existence in the eyes of others, but the protagonists also united because of this. The series will also tell the story of the protagonists' friends, lovers, and families. They will face the disease together, be rejected by others, and the prejudice against homosexuals at the time. In addition to Olly Alexander, other actors include Neil Patrick Harris, Keeley Hawes, Stephen Fry, Tracy Ann Oberman, Shaun Dooley, Omari Douglas, Callum Scott Howells and Lydia West.