Hello!! I'm looking for any detective/crime dramas where one of the main cast characters gets kidnapped. Some dramas I've seen are:

Special Affairs Team TEN 1/2

Gap-Dong

God's Quiz 1/2/3/4

God's Gift - 14 Days is one that comes to mind right away. That's the entire plot of this drama.

Signal also comes to mind, though it is more of a subplot than the main focus of the drama.