Monica is 13 years old and has already created her own world, on the street, where she fights courageously to defend what little she has: her friends, her boyfriend, who sells drugs, and her dignity and pride that makes no concessions to anyone. On Christmas night, like every night, she sells roses to make a living. But life brings her a new appointment with loneliness, poverty, drugs and death.

A gang intends to rescue a friend from a mental hospital, moving around Medellin by bicycle and communicating through a radio program known as "The Inhabitants of the Night".