Jaerin seems like a hip college girl, but she spends her days as a shut-in geeking over Hwi, the male lead of her favorite period drama "Hwaya." As part of a family intervention, her sister talks her into accepting a job as a TV extra. Upon arrival, Jaerin discovers that the set is for "Hwaya" but ruins the takes with her awkward movement. Worse comes to worst when she wanders off set and runs into Ahn, the actor playing Hwi. While Jaerin loves Hwi to death, she couldn't care less about the egomaniacal star bringing him to life. Yet lo and behold, a near-fatal accident transports them into the drama! The once fictional world is now their reality. Jaerin must act out the role of Hwaya, the dragon maiden who saves her country from peril, without butchering her lines. Can she put up with Ahn and pull off her role as the heroine in a world without outtakes?