The discovery of a body believed to be her brother leads Zoe Walker to Ibiza, where she reconnects with his old friend Marcus, a DJ and drug dealer.

The strain on Zoe's marriage intensifies. When David hosts a reunion dinner with the crew, old tensions boil over, pushing Marcus to the brink.

On Anna's wedding day, Marcus's actions come back to haunt him. After suffering yet another loss, Zoe vows to finally figure out who killed Axel.