Can an iceberg save a city? French engineer Georges Mougin has spent 40 years trying to prove that icebergs aren’t just frozen mountains, but reservoirs of the purest 12,000-year-old water on Earth. This documentary follows a “dream team” of glaciologists and engineers as they use 3D scientific simulations to test a radical plan: towing a 7-million-ton iceberg from Canada to the Canary Islands.