Joon-seo initially asks Soo-ryun to take Mina's place for a short period of time until the real singer recovers.
Soo-ryun agrees to the proposal because she badly needs money for her mother's surgical fees and her brother's tuition.
However, Soo-ryun falls in love with Mina's boyfriend Jung Tae-hoon, and becomes enamored with fame and fortune.
Mina goes on television to reveal her true identity, and as Tae-hoon begins to investigate, Soo-ryun and Joon-seo feel threatened.
Mina later learns that Soo-ryun is her identical twin sister, and they had been abandoned at a Catholic orphanage after birth.