Set during the 14th year of Chenghua Emperor's reign, Tang Fan, a sixth rank official and Sui Zhou, an embroidered uniform guard, join hands to crush a conspiracy to maintain peace and order for the people.

Heart Signal is a dating reality show about eight strangers, 4 men and 4 women, living together in the Signal House. The show invites Zhu Yawen, Zhang Yuqi, Jiang Sida, Guan Hong, Yang Chaoyue, and psychologist Jiang Zhenyu as detectives to observe and interpret the emotional development and also detect who might become lovers in the Signal House.