Clean and Serene

In the introductory mission, the main members of The Lost motorcyle club ride to club president Billy Grey's location. He's just been released from rehab and is currently speaking with a parole officer and his sponsor in the drug treatment program. Johnny Klebitz, protagonist of the DLC, hands Billy his old jacket and off they ride. You, being Johnny, take him back to The Lost's clubhouse (which also doubles as a safehouse for the player). In Billy's absence, Johnny has had to run the gang. With Billy's return, Johnny is relieved of his duties. Already, tension between the two seem to surface, evidenced in a cutscene. Billy demands his bike back, which Johnny has sold to pay for Billy's various fees while inside. Eventually the group move out to the shop which was the last known location of Billy's ride. The shop owner is reluctant to give up information, but a full-throttle bike tire to the corner of the mouth by Johnny gets him talking. He sold the bike to The Angels of Death, The Lost's bitter rivals. To repay the shop owner for this injustice, Billy clobbers him in the face with a metal mallet before walking out.

Note: During the introductory cutscene for the DLC, while The Lost are riding in formation down the streets of Liberty City, Niko Bellic can be seen walking on the sidewalk in his default attire, being bumped by a pedestrian and saying something in Serbian to the person.