Twelve-year-old Carly has recently recovered from an illness and to celebrate, Carly, her older brother, Ajay, and her dad go on a climbing trip in the Rocky Mountains. Even though Carly tries to convince her family she is one hundred per cent better, her troubling bouts of tiredness give her away. When an unexpected injury forces Carly and Ajay back down the mountain, Carly’s health is put to the ultimate test.