10,000 km follows the relationship between Alexandra (Natalia Tena) and Sergi (David Verdaguer) in Barcelona, Spain. They struggle to find a balance between their plans of having a baby and Alex's photography career. When Alex accepts a one-year residency in Los Angeles, their distance apart tests the bounds of their relationship. They attempt to use modern technology to keep their relationship strong, but the physical distance proves more challenging than they could have imagined.