Mission: Cross

Police detective Mi-seon goes on regular drug busts with her police squad, showcasing her commitment to combating crime. The team frequently encounters various challenges while trying to uphold the law and protect their community.

Kang-moo, Mi-seon’s husband, meets with Hee-joo, an ex-colleague, to discuss a missing person case involving their colleague, Jung-san. This seemingly innocent meeting sets off a chain of misunderstandings and suspicions.

A couple of police detectives observe Kang-moo with Hee-joo and misinterpret the situation, leading them to report to their boss about a possible affair. Mi-seon overhears their gossip, fueling her doubts and insecurities about her husband's fidelity.

In a flashback set six years prior in Russia, Kang-moo and other South Korean defense personnel attempt to stop a ship they suspect of working with North Korea. To their shock, they discover the ship is actually cooperating with South Korea, leading to tension and conflict.

Kang-moo is captured during the operation and is subjected to torture to extract a crucial passcode. In a desperate attempt to save a colleague, he compromises his own safety by revealing the information.

Mi-seon follows Kang-moo to a hotel room, where she suspects him of cheating. In a moment of heated emotion, she considers using a taser but is reminded by her boss to evaluate the entire context of the situation.

Mi-seon lifts fingerprints from a car that Hee-joo has touched and successfully identifies her. In a critical move, she places a location tracker on Kang-moo’s phone to monitor his activities.

Kang-moo disguises himself as a construction worker to infiltrate the traitorous military unit's torture chamber and rescues a prisoner. This act of bravery puts him in a dangerous position, sparking a series of perilous events.

In the hospital, the rescued prisoner believes he is safe and reveals a secret code to Kang-moo. However, unbeknownst to them, the traitors are monitoring their conversation, leading to deadly consequences.

Kang-moo faces a perilous moment when an army truck collides with his car, resulting in serious injury. This incident escalates the urgent need for him and Mi-seon to escape their dangerous circumstances.

Mi-seon discovers someone stealing a USB stick at the safe house and bravely confronts the thief. She copies the contents onto her phone and destroys the USB, but her actions lead to her being tortured as the traitors seek revenge.

As they narrowly escape together, Kang-moo reveals to Mi-seon that he is a special agent. This revelation brings them closer, and they arm themselves to prepare for the impending confrontation.

Kang-moo and Mi-seon storm the headquarters of the traitorous military unit, engaging in fierce combat. They manage to reset the computer system just moments before a significant funds transfer is completed.

As Hee-joo attempts to make her escape in a car, Mi-seon intercepts her. In a twist of fate, Mi-seon and Kang-moo retrieve the briefcase containing the stolen loot, which they later return to the South Korean army.

Six months later, Kang-moo and Mi-seon are in a safe house, working together on a cocaine bust. Their challenges have forged a stronger bond as they combine their skills to continue fighting crime.