Temporary Family tells a story about four unlikely people who are forced to live together in one house. Real estate agent Hong Siu Lung, was dumped by his greedy fiancé when the house he gave her was too small. One day, he comes across an ad about a cheap penthouse on sale. Wanting to purchase the house and then resell it for a higher price, he strikes a deal with three others – Kam Fung, a wealthy divorcee; Ah Hak, Hong Siu Lung’s stepdaughter; and Very, a wealthy college graduate from mainland China, convincing them to split the purchase with him. When the estate market fell, the four are forced to live together.