Imagine Dragons released the video for their song Demons last week.  They dedicated it to Tyler Robinson.  Robinson died at the age of 17 after a battle with cancer.

Tyler's story is heartbreaking.  He got a staph infection in his leg at 11.  It went septic and he spent weeks in intensive care.  At 16, he found a lump in his groin.  Tyler had Rhabdonyosarcoma, a rare form of cancer.  It was bad.  Doctors said 95 percent of his bone marrow was full of cancer.  It was stage four.

But, after a fierce battle, Tyler was declared cancer free.

Then, the cancer unexpectedly returned.  He died a few months later.

Before you watch the video for Demons, you need to watch the video of Imagine Dragons performing It's Time in 2011.  One of Tyler's favorite lyrics comes from that song.  "The road to heaven runs through miles of clouded hell."  When the band heard about Tyler's story, they dedicated the song to him.  It was clearly a special moment for everybody.

Imagine Dragons singer Dan Reynolds explains the video:

"Our friend Tyler Robinson, who had been fighting cancer for a few years, passed away unexpectedly while we were editing the video.  He was only 17 years old and his courage was an inspiration to all of us.  Forming the Tyler Robinson Foundation with his family was a way for us to honor his legacy by doing something positive - donations to the Foundation will help families who are unable to afford cancer care for their children."  

Click here to donate to The Tyler Robinson Foundation which was established to help families fight childhood cancer.