I have just kind of learned about the Nightingale armor and how cool it is an all. I figured out I have to complete the Thieves Guild quest line.
I went into my quests and do not see a quest on the list of quests I found for the specific quest line. Here is my problem. I have joined the guild, but that was a long time ago. I have no clue weather I succeeded in planting the ring or not. In addition, no matter where I look, I can not find Brynjolf in Riften. Is there any way I can still start these quests?
Also, all of the odd jobs I ask for are auxiliary quests except the "No Stone Unturned" quest and I only need Proudspire Manor to complete that quest. Is that another way to access the main quest line?