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Father Michael Kim Haeil returns, ready to take down a notorious and powerful drug cartel in Busan.

Haeil takes up teaching at a seminary in Busan, as drug lord Kim Hongsik arrives in the city.

Haeil digs into the cartel, while Hongsik begins building his empire in Busan.

Hae-il and Dae-young rescue Ja-young, while a suspect in interrogation suffers an accident amid the chaos, and the three decide to team up in their pursuit of the drug cartel; with his drug plant operational, Hong-sik begins expanding his reach.

Haeil and Hongsik sense the tension as strong rivals, while Kyungsun gains Duhun's favor.

Haeil's pressure on Hongsik and the cartel grows, leading Hongsik to plot a fierce counterstrike.

When the Virgin Mary statue is set ablaze, Haeil is certain it is the work of the drug cartel.

Haeil discovers Hongsik's true identity, leading to an intense face-off between the two.

Haeil's fall signals a new resolve. His team unites, prepared to crush the forces of darkness.

Under flawless disguise, Haeil and Kyungsun infiltrate the ship, but Kyungsun faces danger.

Haeil and Kyungsun narrowly escape danger, while Duhun and Hongsik each plot their own survival