At the age of 17, Héctor runs away from a juvenile detention center and embarks on a journey to find a shelter dog he had befriended in a rescue center whom he has found out has just been adopted. Along his quest, he is joined by his ailing grandmother and older brother. 

Featuring beautiful landscapes of northern Spain, wonderful chemistry between the two central actors, and a simple yet dynamic story, Seventeen proves that what makes a movie great is the quality of its ingredients, not the quantity.