When Yeji wished for a change in her life, she never expected it to come in the form of her brother's friend, Ryujin.

Yeji and Ryujin are caught in a game of cat and mouse; Hwang Yeji, an agent for the Korean National Intelligence Services, is tasked with hunting down Shin Ryujin, a suspected Chinese spy. Things get especially complicated when Yeji realizes her obsession with Ryujin is about more than just her job.