My Dad is Undercover, with his father going deep into the enemy camp to find his long-lost son as the main line, tells the story of Shi Dakai smashing the Japanese R plan during the Anti-Japanese War.

In My Dad is Undercover, Liu Lili plays a stubborn, wise and upright housewife, Ms. Zhang. Because the Japanese army was cruel to the people of China and Master Zhang died, she hated the Japanese all her life.

She was very sad to learn that her son Zhang Faliang had betrayed his country and sought glory as a traitor. When she found out that her favorite grandson was in contact with the Japanese, she flew into a rage and severely criticized; Faced with the threat of the Japanese "bloodbath Zhang family", she refused to bow her head and died generously ... Liu Lili vividly portrayed the image of this "heroic old lady" from her eyes to her tone.

A major feature of the play is to publicize China's food culture. Shandong cuisine, one of the eight Chinese cuisines, often appears in the play, especially many food carving dishes, which are brightly colored and beautifully shaped, bringing gorgeous visual enjoyment to the audience.

In addition, the drama also integrates Shandong cuisine into the elements of spy war, and appropriately presents the cultural heritage of Shandong cuisine in the gripping spy war plot.