Australia is ravaged by catastrophic drought. A father’s desperate bid to save his dying daughter hinges on an audacious plan: tow a colossal Antarctic iceberg across the Southern Ocean. But when a solar-flare-induced earthquake triggers a massive tsunami, the iceberg is hurled onto a deep-sea oil rig—unleashing an apocalyptic oil slick that poisons the seas.

The catastrophe doesn’t stop there. The monster wave surges across the Tasman, slamming into New Zealand’s South Island. Southland’s low-lying farmlands and coastal towns are swallowed in roaring floodwaters; the rugged West Coast is battered by walls of water that obliterate roads, bridges, and communities in an instant.

As nations reel, corporations collapse, and the slick spreads, the crews of the mission must battle the elements, each other, and their own haunted pasts to deliver salvation—or watch two countries drown in oil and ruin.