On the brink of destruction due to energy depletion, the planet "Origin" faces its final days. Dr. K, its top agent, is dispatched to Earth with a flawless appearance to collect the mysterious energy "X." However, he is unexpectedly caught by the eccentric Na Han-byul. Unable to resist her threats, Dr. K begins a strange cohabitation with her. As he meets numerous women on Earth to collect Energy X, something feels off—more than the kisses and intimacy with seemingly perfect women, his heart starts racing uncontrollably at the unpredictable gaze of Na Han-byul...