Por la libre (released internationally under the English title Dust to Dust) is a 2000 Mexican road movie directed by Juan Carlos de Llaca, narrating the journey of two Mexican teenagers from Mexico City to Acapulco to accomplish their grandfather's last wish.

After a funeral mass, held despite the desire Carnicero stated in his will, Rocco realizes his father and uncles are not willing to fulfill the other petition on the will: to have his ashes thrown into the sea at sunrise, in Acapulco, and decides to do it on his own.

The outcome leads them to visit Felipe in his restaurant, where they get a loan and Rocco notices an attractive girl who just left a bunch of flyers advertising a hotel.

At the same time, Rodrigo and Irina get back from the disco, but they find the hotel room locked and neither of them has money to rent another.

She confronts them and refuses to give back the ashes, forcing them to leave, and then at request of her mother, Perla (who had been Carnicero's lover) explains to her what happened.

Out of rage and shocked by the revelation, Rodrigo slams the car he inherited from his grandfather, but he and Rocco end up coming to terms with Perla and Maria's decision and accept the half they are given.

Pureza sees that Maria has the watch, deducing the relation between her and her father, and Rodrigo and Rocco are shown to have built a bond, supporting each other.

He also claims to have forced his mother to leave home, after he found her cheating on his father, but it's never clearly stated if it's true or made-up, although he says that for a time he thought it was his fault.

Ana de la Reguera as Maria, Carnicero's illegitimate daughter and Rocco's love interest.

Despite being offered a scholarship to study oceanography in Baja California, she's willing to turn it down in order to help her mother run a hotel.

She never married in order to take care of her parents, but at Carnicero's funeral mass, she accidentally manages to meet a man.

Of all the boy's parents and uncles, he's the one depicted in the most negative light, shown as greedy, completely uncaring of what his father or son want, and only concerned with his impending wedding.

Years before the events depicted in the movie, she worked as a chef at Felipe's restaurant, where she met Carnicero and got involved with him, and later left to start running a hotel on her own.

He dies the day of his 75th birthday, and his wish to have his ashes thrown to Acapulco's sea starts the main plot of the movie.