Siheyuan: The Mastermind Behind the Sign-In System

A promising young man from the twenty-first century

unexpectedly arrives in Love in the Courtyard,

and takes over the body of He Yuzhu, a chef from the 1960s.

All he wants is to live a quiet, peaceful life.

But as one courtyard squabble after another comes his way,

he uses the sign-in System to stay hidden behind the scenes.

Only when the courtyard's troublemakers look back on the past do they realize:

the most inconspicuous one was the biggest boss of all.