Bir Kalp Bir Kere Sever Orphaned and hardened by the streets, Eşref Tek rose to rule Istanbul's underworld, all while clinging to one fragile memory: the girl he named "Rüya". Years later, he meets Nisan, a talented musician whose fire reignites something long buried.Betrayal, danger, and redemption collide - will their love survive the shadows, or will it burn them both?