During the National Day holiday, my older brother brings his green tea girlfriend home. Along the way, she makes a fuss, grabs the front passenger seat, fights over luxury cars, and even attempts to swallow up a high-end agritainment resort. My love-brained brother favors her everywhere, but forgets that my mom is a 'max-level yin-yang master' who has been doing community mediation for twenty years! Facing her family's pathetic calculations and moral kidnapping, my mom throws down account books and chokes them with logic, exposing on the spot my trump card as the full-payment behind-the-scenes big boss. The toxic family's abacus fails and instead they are held legally accountable, watching how a sharp-tongued, sarcastic mom uses fancy slaps to launch a super refreshing family defense war!