The helicopter flies through the cold air of Antarctica. Inside the green vessel are two pilots and five other people with enough gear to survive the harsh climate at the bottom of the world. There mission is a simple one. Find the missing scientists, or at least find out what happen to them. The team only has a two week time span to full fill that mission before the helicopter returns to collect its team again.
The companies that had funded the scientists are nothing odd. They are alternative energy companies that want more evidence on the effects of green light gases have on the planet. Mostly to raise awareness, but it also means they can sell their natural energy to more customers.
The scientists themselves are well respected researchers in their fields and don't even have enemies. A few rivals, maybe, but no one that has any reason to do them harm. This is not the act of foul play, but it isn't as simple as getting lost either. These scientists had visited Antarctica before and some are season veterans of the frozen continent. The former ranger of the team might be able to learn a thing, or two from the team if he ever finds them.