The secret of '66 in 'Manager Kim is revealed. I definitely have to watch it hahaha

The story unfolded of two men who grew into legendary operatives while enduring grueling training together, only to fall into a trap during an operation. Ultimately, the tragic ending left a deep lingering impression, with Park Young-kwang losing his life and only Chief Kim surviving. This episode is expected to reveal the background of that tragedy along with the true meaning of the name '66'.