Help!

[jerkplus_suger]

Uhm, i'm looking for some story.
It's cross over with supernatural.

I remember story a bit. Sam and Dean is hunting somewhere and Jim also there!
and Jim know Winchester brothers.
Jim and John Winchester was knew eachother when they stayed army.
And also Jim know John and Dean, Sam are hunting ghoust.

Anyone know about this?

I had to click rignt side tags, but only two story for cross over with supernatural.

So, help me pleaseeee????