She was once cut off by her husband's family, raising her child alone and working hard for twenty years. Now living a stable life, she still takes the initiative to work as a hotel cleaner, just wanting to earnestly experience the ordinary daily life. He sees through the scheming and hypocrisy of the business world, shedding all his identity disguises to work as a food delivery rider with a five-thousand-yuan monthly salary, seeking only to meet someone who doesn't value material things and treats him with genuine sincerity. An outrageous blind date makes two "disguisers" bump right into each other. One fancies his "authenticity," and the other fancies her "purity." When the broom meets the electric scooter, two people hiding their own circumstances talk about a most grounded "underground romance."