A mind-bending psychological mystery is here! When Song Zhiyao, a psychology PhD who returned from overseas, uses her expertise to light the way for others, her own soul is still adrift in dark currents. In this psychological battle of wits, worthy of a suspense mystery, masterful techniques from psychology become her weapons against the abyss. Every case is a prism reflecting the heart, and every counseling session a locked-room escape from the subconscious. With its sharp female perspective, this coming-of-age novel takes you through a thrilling self-dissection with the tools of psychology, until you find the light of salvation that belongs to you.