Thieves' Guild Quests - The Elder Scrolls V: Skyrim wiki

When you first visit Riften, if you wander around the marketplace just outside the Bee and the Barb, a man named Brynjolf will engage you in conversation. This marks the beginning of the Thieves' Guild questline.

01 - A Chance Arrangement

02 - Taking Care of Business

03 - Loud and Clear

04 - Dampened Spirits

05 - Scoundrel's Folly

06 - Speaking with Silence

07 - Hard Answers

08 - The Pursuit

09 - Trinity Restored

10 - Blindsighted

11 - Darkness Returns