The narrative turns on the revelation that Hwang Tae-kyung’s estranged mother, the legendary singer Mo Hwa-ran, was romantically involved with Go Mi-nyeo and Go Mi-nam’s late father, Go Jae-hyun. Mo Hwa-ran selfishly abandoned Tae-kyung as a boy to chase Jae-hyun, while Jae-hyun wrote his masterpiece song "Without Words" for Mi-nyeo’s mother, not Mo Hwa-ran.
When this entangled family history comes to light, Tae-kyung is crushed by the realization that his mother’s obsession destroyed Mi-nyeo’s family. Believing their love is cursed by their parents' sins, Mi-nyeo decides to step away.
In the finale (Episode 16), the real Go Mi-nam recovers and returns to resume his idol career. Before Mi-nyeo leaves South Korea for missionary work in Africa, she attends A.N.JELL’s massive stadium concert in plain clothes. Tae-kyung stops the concert, addresses his night blindness, and walks into the audience, declaring that he will never lose her again. The series ends with the couple reunited under the starry night sky, looking forward to a shared future.