Blacktide Den Mission - Dropped from Log

I started the Blacktide Den Mission. Was on the first leg "The Iron Truth" and was in the swamps South of Blacktide. Had to log off so I Map Travelled back to Blacktide Den and logged off.

Next Day start up and the mission is gone from my Quest log and I can not restart it.

I have tried talking to the NPC's I originally got it from but so far no luck.

Any suggestions?

Blacktide Den is a mission. To start it you speak to the NPC with the green ball above their head.

The Iron Truth is a primary quest which you would only get after completing Blacktide Den.

It sounds like you need to redo the mission at BD.