is the 17th chapter/17th mission in Borderlands 3. This mission is unlocked after the completion of the mission Cold as the Grave.
The recommended level for this mission is 28, and the mission that follows it is Angels and Speed Demons.
For those that need a step-by-step style walkthrough; IGN's Wiki guide has got you covered. https://www.ign.com/wikis/borderlands-3/Blood_Drive
For those that prefer a more visual
guide; YouTuber "ZaFrostPet" has got you covered.