Running with Wolves (2010)

Gudrun Pflueger, first seen in A Woman Among Wolves, returns to wolf country after a grueling and terrifying bout with cancer. Determined to fight for the wolves who gave her the strength to survive her illness, Pflueger battles freezing temperatures and personal setbacks to track the wolves in the wild. The data she collects in the wolves' dwindling habitat may one day help stave off extinction of this keystone species. Witness the dramatic story of survival and endurance that culminates in nothing less than a scientific miracle.