Five-year-old Hope scours city gutters alongside her mother, Lynn Foster, collecting discarded recyclables to fund treatments for Lynn's aggressive leukemia. Fortune pivots when Hope administers emergency pills during an elder tycoon's sudden collapse, prompting the grateful grandfather to bring the impoverished girl into his sprawling estate.
Noticing her resemblance to his emotionally detached heir Eric, the patriarch offers substantial monthly subsidies if Hope impersonates Eric's daughter. While Eric initially despises the hired child as a greedy opportunist, an ancestral lullaby she hums reveals that her mother is the lost love he spent years mourning.
