After working tirelessly for most of his life, Zhou's father has supported his family single-handedly and even given his mother 500 yuan every month for her upkeep. Unexpectedly, his mother has secretly been using his savings and household supplies to support his younger sister, and has even privately promised the demolition compensation apartment to her grandson. A birthday feast of crabs exposes six years of favoritism and lies. When family affection becomes something others take for granted, Zhou's father finally refuses to back down and leaves the family home with his son. This time, he just wants to live for himself and his child.