The plight of elderly people suffering from conditions like Alzheimer's and other degenerative disorders resulting in memory loss. When Yesterday Comes takes the route of a compendium of four shorts by different directors.

Following the widespread praise for Bei yi wang de shi guang (2010), another film was made in 2012 to spread awareness and understanding of senile dementia and the plight of the elderly. Again produced for the Taiwan Catholic Foundation of Alzheimer's Disease and Related Dementia, When Yesterday Comes is an omnibus of four shorts by emerging filmmakers Wi Ding Ho (Pinoy Sunday (2009)), Ko-shang Shen (Zhu li ye (2010)), Hsiu-Chiung Chiang (Cheng zhe guang ying lu xing (2009)), and Singing Chen (Yi xi zhi di (2009)). Well-known Taiwan actors like Chang Chen, Sonia Sui, Amber Kuo, Lieh Lee, Huan-Ru Ke, Chiang Ting, and veterans Pao-Ming Ku and Ai-Chen Tan spared their time to appear in the meaningful feature. In Hsiu-Chiung Chiang's "Healing", Chang Chen takes to the streets to look for his grandfather who has wandered off, and unexpectedly runs into a past lover (Sonia Sui). Wi Ding Ho's "Wake Up in a Strange Bed" looks at the world from the perspective of an Alzheimer's patient (Chiang Ting) who encounters his first love in a park, and returns to the moment of their first meeting. Ko-shang Shen's "Power On" portrays how a senile grandmother who believes she's a singer, her tired daughter (Lieh Lee), and her wacky granddaughter (Amber Kuo) find a new way of living together. Singing Chen's "The Clock" draws a connection between the memories of the elderly and the urban space, exploring how people view fading memories and the disappearing city.