A schoolteacher heads off into the Tasmanian wilderness on an overnight adventure, but the weather takes an unexpected turn for the worst - the temperature’s plummeting below zero and the teacher has lost sight of the track-guide markers. As a rescue team searches for him, another heads to the sea to save people from a sinking boat, though they don't have enough room to save them all on one go. Faced with a tough decision, the team must act quickly, as sharks have been spotted circling the survivors.

A schoolteacher heads off into the Tasmanian wilderness on an overnight adventure, but the weather takes an unexpected turn for the worst - the temperature’s plummeting below zero and the teacher has lost sight of the track-guide markers. As a rescue team searches for him, another heads to the sea to save people from a sinking boat, though they don't have enough room to save them all on one go. Faced with a tough decision, the team must act quickly, as sharks have been spotted circling the survivors.