One day, young Li Na receives a call. It's from her little brother, who's home alone, waiting for his father to return. He's been gone for days and hasn't given any further signs of life. With the successive calls, the tension grows, as does Li Na's need to help, despite the insurmountable distance that separates them. Roberta Chávez breaks down the boundaries between social drama and urban thriller in a film that radiates a serene nostalgia.