LONDON — Kris Thykier’s Peapie Films is teaming with Anonymous Content to produce “Repent,” based on the true story of a Swedish man who falsely confessed to being a serial killer.In the 1990s, Thomas Quick admitted to 30 killings, and was jailed for eight of them. But in 2001, he revealed that he had made up the whole story. The film is written and will be directed by Agnieszka Lukasiak, who spent her early years as a documentarian interviewing Quick, and has maintained contact with him for the past 15 years. “Repent” explores Quick’s story through the eyes of an investigative journalist based on Lukasiak herself, who unearths the complex reality behind his lies and confessions. Worldwide sales are being handled by Embankment Films. “It’s a story that I have been living for the past 15 years, and it has been horrifying, shocking and eye-opening,” Lukasiak said. “I think it’s a unique story that is important to tell, as it is significant enough to spark changes in the justice system. At the same time it has all the elements of a great thriller.” Lukasiak, who is based in Los Angeles, Stockholm and London, has directed several theatrical documentaries, and made her drama debut in 2010 with “Between Two Fires,” about child trafficking in Belarus.