General Choi Young is a Guardian of his people, possessed of magical powers of unknown origin. His life has been corralled by duty, until he’s compelled to seek a supernatural doctor to save the new queen of his people. He travels through a time portal to find Heaven’s doctor, and is entranced. Yoo Eun-Soo, a 21st Century Guide, is unbonded, but she recognizes her Sentinel immediately. She is not, however, prepared to be taken from her own time to his!