When Hank goes missing on a wilderness hike, Krista devotes Arctic Air's resources to finding him. Bobby and Krista find him trapped under a boulder in need of immediate medical care, leading Petra to guide them over the radio to save his life.
Krista heads up a dangerous rescue of climbers when Tag returns to complicate things. Mel's ready to retire. Bobby is almost killed after Kimbo makes a death threat. Dev wants Astrid to pretend to be engaged when his parent's visit.
A plane crash in a remote area endangers the survivors as it's upside down, half buried in the snow.The rescue team is caught in a blizzard with Tag's life in the balance. Krista's piloting skills are put to the test.