The Laughing Policeman

In the city of San Francisco, a bus ride turns into a nightmare when a passenger brutally kills the eight other passengers and the driver. Homicide detectives Jake Martin and Leo Larsen are tasked with finding the killer, who has a personal connection to Martin. As they investigate, they uncover a web of secrets and corruption in the city's seedy underbelly. Martin's search for justice leads him to a bizarre theory linking the bus massacre to an unsolved murder case from two years prior. With Larsen's reluctant help, they must work together to track down the killer and bring them to justice.