Jun Qinglan, a wealthy young lady, suffers a tragic fate when her family is destroyed and her fiancé, Li Congyao, not only fails to rescue her but also disfigures her. After escaping, she adopts a new identity as a skilled male coroner to seek revenge and clear her name. When she unexpectedly encounters Li Congyao again, he has become cold and brutal, even abducting her as his male concubine, reigniting their conflict.
Former friends Kwok Pak-fei, Keung Hei-man, and Lau Lik reunite years after a botched operation led to a tragic death and estrangement. Now, a gruesome murder case tied to a human trafficking ring forces them to work together. As they investigate, mysterious messages appear with clues about the crimes, hinting at knowledge from the future. Together, they form a special unit, ASIB, to decode these messages and solve the chilling case.