Act 1: Micaëla and Don José fall in love and decide to get married. Don José and Carmen fall in love, which is fine with everyone's established boundaries. Act 2: Carmen and Escamillo fall in love. (Lots of dancing!)
Act 3: Don José is a bit jealous, the three of them meet and talk it out. They find ways to reassure one another better. Act 4: Carmen's feelings for Don José change, and they negotiate a tricky relationship transition. Everyone gets tapas together afterwards.