Full-time mother Hong Nga-yau and her husband Yau Tsoi-shan have a two-year-old daughter called Yau Yat-tung. The family and Nga-yau’s parents Hong Lok and Fong Chor-kiu are living under the same roof. Yat-tung is going to apply for kindergarten. Tsoi-shan feels annoyed as Chor-kiu keeps giving him advice. Nga-yau takes Yat-tung to attend “separation class”. But her efforts are wasted. Yat-tung just resists everything. Nga-yau is certain Yat-tung has separation anxiety disorder (SAD). Nga-yau realizes her mother-in-law Kam Mei-foon has a perfunctory attitude when it comes to raising kids. But her one-year-old nephew Yau Ka-yiu, who is looked after by Mei-foon, performs better than Yat-tung. Nga-yau decides to let Chor-kiu look after Yat-tung for one day. But she just has to rush home as she is worried about Chor-kiu’s lack of stamina. Nga-yau’s bad temper is getting worse. Tsoi-shan eventually makes her realize she has always suffered from SAD.