Nothing in Return (2015) on Netflix

Plot summary

Dario is sixteen and lives in Madrid with his divorced mother. When he is expelled from school he takes to the streets rather than stay in a home he wants to escape, and he spends the summer with his friend Luismi. The two of them get to know Justo Caralimpia, who runs a bicycle shop and deals in stolen motorcycles and parts, and Antonia, 93, who gathers abandoned furniture in her three-wheeler and sells it on. The old woman, the teenagers and the shopkeeper end up living as three generations under one roof in a city where none of them has much. The friends set out to raise bail money for Caralimpia, and the summer pulls them toward the crime around his shop.