Mission: Cross 2024

Police detective Mi-seon goes on regular drug busts with her police squad. Her househusband, Kang-moo, meets up with an ex-colleague of his, Hee-joo, about a missing colleague, Jung-san. A couple of police detectives witness their meeting, and mention to their boss that Kang-moo is having an affair. Mi-seon overhears them speak, and later also sees some photos of Kang-moo with Hee-joo.

In a flashback in Russia 6 years ago, it is revealed that South Korean defense personnel, including Kang-moo, attempt to prevent a ship from sailing because they think it’s working with North Korea, but are shocked to discover that it is actually working with South Korea. Kang-moo is captured and tortured for a passcode, which he gives away to save his colleague, and is asked to leave the force.

In the present day, Mi-seon follows her husband sees him with Hee-joo in a hotel room. She takes out a taser to stun them, but her boss pleads with her to take a look at the full picture before using violence. Mi-seon lifts fingerprints off a car that Hee-joo touched and determines her identity. She also places a location finder on her husband’s phone to know his whereabouts. She learns from another police officer about the emblem of a traitorous South Korean army unit that looks like an “H”.

Kang-moo disguises himself as a construction worker and breaks into the traitorous military unit’s torture chamber and frees a prisoner. When the prisoner is in the hospital and believes he is free from danger, he reveals the secret code to Kang-moo, which the traitors come to know due to a hidden camera. The prisoner suspects something is amiss and calls Kang-moo to warn him, but is killed. Kang-moo is injured when an army truck rams into his car.

Mi-seon goes to the safe house where her husband was, and sees someone stealing a USB stick. She takes it from him and copies its contents to her phone and sends it to her husbands phone, and then destroys the USB drive. She is tortured and reveals the file location. Meanwhile, Kang-moo frees himself and arrives to save his wife, and they flee by truck. Kang-moo confesses to his wife that he is a special agent, and together they enter the safe house and arm themselves with weapons.

Kang-moo and Mi-seon go to the traitorous military unit’s headquarters and fight with the guards and reset the computer systems just before the funds are transferred. Hee-joo tries to escape by car, but is stopped by Mi-seon. The husband and wife take the briefcase with the loot and hand it over to the South Korean army.

Six months later in a safe house, Kang-moo and Mi-seon work together on a Cocaine bust.