The best of friends are those who stick together through bright and dark times alike. That’s what outdoor photographer Ben Moon and his dog, Denali, were: the best of friends.

Denali was Moon’s adventure companion when he travelled in the west of the US in a van for three years. He was also his support when Moon was diagnosed with cancer and went through treatment. “When you’re going through all the cancer treatments and surviving all that, you really don’t have the energy to give on a human level a lot of times”, Moon explains to OPB, “It takes energy to just hang out with your friends, but with a dog, they don’t expect anything. He was just that constant support by my side.”

This short video is the story of this exceptional bound told from Denali’s point of view. It’s a genuine and moving portrait of what it’s like to say goodbye to your best friend.