The San Francisco Police Department is struggling to control crime in Chinatown, particularly the activities of an unknown figure known as "The Dragon", who leads a drug ring and commits murders. Captain Walton calls in Harold Bledsoe, the son of a former police chief, to assist in the investigation, despite knowing little about him. Harold, a bespectacled and fussy man, focuses on his hobbies, including fingerprinting, which leads to a wild goose chase in Chinatown. As he navigates the mysteries of the neighborhood with sidekick Patrick Clancy, Harold's personal connection to the case grows when a boy's experimental treatment is threatened due to The Dragon's activities.
Welcome Danger
A botany student is summoned back to his hometown of San Francisco to assist in solving a series of crimes in the city's Chinatown district, a task that holds personal significance given his father's previous role as police chief.
