More than a decade after leaving home Dawn finds herself stuck in a dead-end job, in a rundown flat, while her sister has it all - the husband, children and prestigious job in sunny Australia. Their mum’s favouritism is palpable, and even as she has a terrible fall leaving Dawn to pick up the pieces, nothing Dawn does can live up to her perfect, absent sister. But still Dawn persists with taking care of her aging and fragile mum, until one day it begins to feel like the only thing standing between Dawn and her happiness is her mother's continued, pitiful existence...