They move to a private room in one of the shadier establishments. A few advanced privacy charms later and they’re spilling everything to each other. Regulus tells Barty of his encounter with Dumbledore all those years ago and his plan to protect Sirius from afar. Barty tells him of his time in Azkaban along with Sirius and Bellatrix. He talks about Harry, about his relationship with the three. And then he talks about the Dark Lord's return and his plan.