Detective Ma Seok-do changes his affiliation from the Geumcheon Police Station to the Metropolitan Investigation Team, in order to eradicate Japanese gangsters who enter Korea to commit heinous crimes.

In 2029, Korea's lunar probe Woori embarks on a historic journey to the moon, capturing global attention.

The ‘Beast Cop’ Ma Seok-do heads to a foreign country to extradite a suspect, but soon after his arrival, he discovers additional murder cases and hears about a vicious killer who has been committing crimes against tourists for several years.

The massive scandal comes to light through a father's unwavering search for the truth behind the sudden death of his family.