Jewelry designer Zhou Ling goes abroad for an exhibition for twenty days, but late at night when she returns, her door lock password has been changed. Sun Guifang, the live-in nanny she hired, has actually brought her son, daughter-in-law, and grandson—a family of four—to usurp the nest like the magpie: sleeping in the master bedroom, wearing the bathrobe, starving her cat, and even prying open cabinets to steal and sell jewelry worth over 200,000. Zhou Ling neither cries nor makes a fuss; relying on contracts, door lock records, hidden surveillance, and a recording, she steps by step lays her plans, publicly shows her cards, closes the loop on her evidence, and completely roots out the nest-usurpers along with the behind-the-scenes counterfeit supply chain, reclaiming her own home.