Park Yoochun perfectly transformed into a homicide detective in "I Miss You."

On a recent shoot for MBC Weds/Thurs drama "I Miss You," Park Yoochun is getting ready to punch a possible criminal and unleashing his pent up anger.

Park Yoochun inadvertently finds out about the first love he lost because of a certain case and he has been working ever since then to find out who was really behind the crime and became a homicide detective. 

In the picture, Park Yoochun is throwing away his previously soft and gentle image and transforming into a charismatic and macho detective.

One drama exec said, "He showed some really new acting with his charisma. You don't want to miss the action scenes."