It's the last frontier. And these are the last of the true Arctic aviators. Young pilots with a taste for adventure have come to Buffalo Airways to earn their wings, flying vintage steel built for war. But it's a different war; a war against bitter cold and constant breakdowns, and a war to get the job done and to stay alive in the toughest conditions on the planet.
Joe hires outsider Duane Hicks to help Buffalo navigate the future and coach Mikey. Gord and Sean's DC-3 delivery mission to the High Arctic goes awry when blizzard conditions and a broken oil cooler force an emergency landing.
Buffalo gets into the stunt flying business when veteran pilot Arnie flies the DC-4 for the re- enactment scene of a famous WWII bombing raid. A routine C-46 flight becomes dangerous when a hole in the plane's aging exhaust system sets off the fire alarm, and Devan has to decide whether or not to shut down an engine mid-flight.
Critical of the many stops and starts in the Electra program, and frustrated with the constant drama at Buffalo, Chuck quits. Joe clashes with the maintenance department when a series of delays puts the sale of an old Canso waterbomber in jeopardy. Mikey goes on an ATV hunting trip and Rod babysits his daughter, Emma Rae, while his wife Sasha goes to a wine gala in town.
Frustrated with her lack of flying and stuck in a rut as a courier driver, Audrey decides her time at Buffalo is over. Devan, Ian and Jimmy deal with a hydraulic fluid leak in the C-46 on the valley run, which forces Jimmy to crawl into the "hell hole" and crank down the landing gear by hand.
When a ferry breakdown causes a gasoline shortage in Yellowknife, new manager Duane begs Chuck to return and prepare the Electra for a fuel haul. Cory leads a clandestine rescue mission to retrieve an abandoned C-46 and Mikey escapes to Ottawa for a birthday joyride in a fighter jet.
Duane lands a huge contract for the Electra and puts enormous pressure on mechanic Adam to prep the plane without the help of his mentor Chuck. Kelly plans her Mexican wedding, but Jynelle's sudden resignation leaves her in the lurch. The power goes out in Yellowknife, spurring Joe into crisis mode.
The Electra flies to Alert, the northernmost settlement on Earth, forcing Adam and new senior manager Duane to work things out. Hay River rampie Tyler is on the fast track to a co-pilot seat, but first has to prove his flying ability to Buffalo's new chief pilot, Justin.
Sparks fly when Joe discovers Gord has taken a job with a rival airline after completing expensive training on one of the Buffalo planes. Larry, a rookie rampie, makes a near fatal error while training on the C-46. A desperate search is launched for elusive C-46 parts.
Trying to make his mark at Buffalo, Duane lands two more Electra contracts. But his over- zealous efforts result in a clash with the crew and with Joe, and a down-to-the-wire midnight departure to meet a deadline. Rookie DC-3 co-pilot Tyler discovers that landing the big plane takes practice.
Duane's decision to leave the Electra crew unsupervised while he spends time at home jeopardizes the completion of a major contract, and could cost him his job. Young DC-3 co-pilot Graeme sees his chance to move up to a bigger plane disappear when he falls out of favour with Joe.
Mechanic Jimmy is sent to a northern mining camp to create an ice landing strip on a remote lake where AJ will have to land a DC-3 and the much bigger C-46. New co-pilot Tyler faces the ultimate test - flying the sked with Joe. And Mikey turns the Buffalo hangar into a playhouse for his niece's first birthday.
Engine troubles on the C-46 during the valley run force Devan to shut down an engine. High winds wreak havoc for Devan and his crew on another C-46 mission to help clean up an oil spill in the Northwest Territories. Scott trains on a CL-215 waterbomber and visits his mentor Arnie, then joins the waterbombing crews when Buffalo is called in to fight a massive fire in Alberta.
Rookie waterbomber pilot Scott gets his first taste of action when Buffalo responds to an emergency callout to fight fires in Alberta. Mikey and Rod think they hit the jackpot when they buy a million dollar firefighting plane on eBay at a bargain price. Joe marks his 50 years of flying by returning to the place he grew up in his historic Norseman.