London, 1970. Fresh out of a dead-end job, Joyce answers an ad in the local paper: Kathmandu by van, leave August. Share petrol and costs. Joyce is desperate to escape life in suburbia, and aristocrat Freddie looks like he can show her a wild time. Together with Anton, Freddie's best friend from boarding school, they embark on the overland trail from London to Kathmandu in a beaten-up old Land Rover. But as they cross the borders into Asia, Freddie can't outrun his family's history, leading to devastating consequences for everyone.