Downstairs is an adult animated series that follows a cast of wacky and colourful Kopitiam stalls owners on the ground floor of an unnumbered HDB flat, in an unnamed HDB estate. Together, everyone seems to bring out the very best and worst in each other as they embark on crazy adventures throughout their little neighborhood.
Boi is a young man starting out in a new job as a chauffeur. While anxiously waiting for news from his girlfriend regarding a decision that could change both their lives, he must accompany his first clients, Michael and Gordon, two Asian businessmen who have come to Barcelona in order to close a multimillion-dollar deal.
A little girl's parents have to go overseas for work, so she is sent to stay with her grandmother for that period. The grandmother only speaks Teochew, which the little girl can neither speak not understand, so the initial generational and linguistic gaps result in friction and misunderstanding, until an accident unexpectedly brings the whole extended family closer together, and the child bonds with both her grandmother and her parents.