14 years ago, Jinwan and Bell were mercenaries in Babylon and belonged to the same action group.Although they both have ruthless natures, there are differences in how they carry out their missions.Jinwan and Shengzu's team celebrated their victory, but Bell was missing.After Bell gets lost, he encounters a couple asking for help, but he murders them.Bell shot and killed a new co-worker who witnessed Bell's crime.Entering the bay finds them and asks about the circumstances of his colleague's death, but Bell shoots a kid with a gun before entering the bay to stop him.Bell was brought to court for trial, but Shengzu and Jinwan testified in support of Bell, admitting that they did not see Bell killing civilians.

Afterwards, he entered the bay and asked his superior Li Yonghan not to involve Bell in his subsequent dispatches.Yonghan agreed, but the same combination of personnel was repeated for the second operation.When Jin Wan asked Han Yong Han to fulfill his conditions, the latter stated that there was a higher-level order requiring Jin Wan to work with Bell.The mission of the second operation was to bring the largest drug supplier from Laos to China.Before the team begins their operation, Jinwan warns Bell not to make the same mistake of handing over unarmed civilians to the police.Although Bell agreed, he continued to kill civilians, including blowing up a group of women in a cell.On the other side, Jin Wan and Xi Xin completed their mission and looked for other team members.

Entering the bay, they found that Bell had killed more civilians, and ordered everyone to arrange bombs to blow up the buildings and leave, saying that they would report Bell's behavior to their superiors.After the others leave, Jin Wan finds Min Hui there.Enter the bay and wait for everyone to leave before going back to rescue her.As the bomb counts down, the two attempt to escape.However, Bell shows up and finds Into Bay with a civilian.Jinwan takes Minhui out of danger and confronts Bell.Bell said he enjoyed killing people for money, regardless of whether they were allies or enemies.The two started a fierce battle.Bell is injured and nearly kills Jin Wan when Min Hui shoots him in the eye.Bell threatened to kill Jin's family if Jin didn't kill her.Jin Wan stabbed him and left with Minhui in time. The bomb detonated at this time. Jin Wan thought Bell was dead.

After returning to the team, Jinwan made up a story that Bell saved him and sacrificed himself during the operation.The group mourned Bell's death and burned his belongings.His belongings were burned.Jinwan quit his job and went home.However, Li Yonghan asked someone to follow him into the bay.Jin Wan saw the stalker at the bus stop and even asked an acquaintance to stay away from him.Finally, Jin Wan returned home and met his family, including his niece Zhi An, whom he met for the first time.At the end of the episode, the Holy Ancestor witnesses Bell's return.