Prison offers ample time to reflect and hopefully reinvent. For one Matthew Stoneman, it brought him to learn Spanish, fall in love with Cuban music, and dream of making it big singing songs in Spanish in Cuba. Since then, he’s earned the moniker of the “Gringo Mariachi”.

The offbeat, often humorous journey makes for the undeniably fascinating story in the documentary Mateo directed by Aaron I. Naar. 

Watch the trailer here.