Nineteen-year -old Annabella Milbanke, visiting London for the swirl of parties and engagements of the season, is introduced to Byron at a waltz. He has just published Childe Harold, and is surrounded by a crowd of admirers, one of whom is his half-sister Augusta Leigh. Annabella and Byron fall in love, but Augusta's unwelcome presence in their relationship becomes increasingly unbearable. Caught up in a potentially scandalous love triangle, Annabella must decide whether following her heart is the most dangerous thing she has ever done . . .