Having lost her father at an early age, farm security guard Chan Sai-Mui (Yumiko Cheng) grew to be an outspoken and determined woman who would do her utmost to protect her home village. It is her sincerity that has won her respect from all villagers of the Leung Choi County. Sometimes she would get too enthusiastic and impulsive that she could bring about a lot of misunderstandings. Amusingly, she has mistaken the newly appointed agricultural magistrate Tse Wong-Sheung (literal meaning "Thank you, Emperor") (Steven Ma) for a thief and the two of them have been bitter enemies ever since. To keep himself from any possible trouble, Sheung has been avoiding Mui intentionally.
