After her last heart transplant fails, Maria is in desperate need of a new heart. Fearing it could give out at any moment, she turns down her boyfriend’s proposal and heads out for a walk — only to mysteriously disappear. As the search intensifies, homicide and missing persons detective Vicky and her rookie partner are assigned to the case. With Maria's time running out, it becomes a race to uncover the truth behind Maria's disappearance before her failing heart gives out.