A sequel titled (based on the book Harjunpää and the Iron Room ) has been in development, intended to continue the story of Detective Harjunpää. US Screenwriters' Strike Boosts MRP Matila Röhr

: The film is noted for its gritty, "un-tourist-like" depiction of Helsinki , which adds to its dark, Scandi-noir aesthetic. Comparison with the Novel

The film is based on the novel by Matti Yrjänä Joensuu . While the movie focuses heavily on the psychological battle and action, the book is part of a celebrated series known for its realistic portrayal of police work and the "seamier side" of human nature. Potential Sequel

: The investigation becomes a personal vendetta when the killer begins stalking Harjunpää's family , specifically targeting his wife and daughter.