With global warming, the Arctic has become navigable, and the race to claim it heats up. As a four-nation conference on the issue unfolds in Toronto, a faraway collision under the polar ice turns a group of Canadian sailors into bargaining chips. Kessler and ICS must find a way to broker a deal that saves the sailors without selling out Canada's future in the Arctic -- even if that means betraying personal bonds to U.S. Agent Carver, and British operative Charlotte Bates.