From a young age, Yeon-hee aspired to be an action movie star. Despite her exceptional skills with a sword, the path to achieving her dream proves overwhelmingly difficult. Her fortunes change when she lands a job as a stand-in for an action film. However, upon arriving on set, she is unexpectedly whisked away to a chaotic parallel universe where sword-wielding inhabitants engage in unchecked violence. She is quickly embraced by the local community as their guardian and earns their admiration. Determined to protect the villagers, she takes on the role of a heroine, battling against the antagonists.