Watch Relentless

When her daughter is kidnapped by human traffickers in El Salvador, an American mother searches the murder capital of the world for her child, following her through Central America and Mexico via 'The Train of Death.'

Relentless is a 2018 thriller with a runtime of 1 hour and 35 minutes. It has received mostly poor reviews from critics and viewers, who have given it an IMDb score of 4.6.