Diagnosed with Stage IV breast cancer at 23, Kris Hallenga made a radical decision about what she wants to do with the rest of her life. Together with her twin sister, Maren, Kris founded the Coppafeel charity, harnessing the power of her own experience to show millions of young people how to check for signs of cancer. In 2013, Kris made a film about her life for the BBC and, over the decade that followed, continued to invite the cameras back. This film reveals how her energy, drive and ambition has left an important legacy