Over burning sands in summer and snowy plains of minus 30 degrees Celsius in winter: One medical team is traversing Mongolia to examine and operate on rural children with heart defects for free. Top heart surgeon Dr. Boldsaikhan launched the project in June 2020, saving some 200 children a year with funding from corporate and private donations. But as he fights his own battle with stage four stomach cancer, he is also focused on training his mentee Dr. Khashchuluun to ensure the project will survive. Follow these extraordinary doctors and their team through a year of hard work.