Detective Sergeant Riku Hartikainen ends up investigating the death of his friend, mentor and former superior Kari Falck who dies in a line of duty just when he was about to retire. It turns out that Falck's murder is just the tip of an iceberg in a way more complicated case that is related to Hartikainen's past. More people die as the mysterious killer is on the loose. Hartikainen must face his fears in a deadly chase that'll put his wit and courage to the serious test.