Is sonar noise responsible for the stranding of whales in Tekoura Bay, New Zealand? Marine biologist Joe Waldmann thinks so, and is trying to prevent energy giant Gasonec from drilling for gas in the bay. When he is killed in a dubious explosion, his daughter Anna is convinced that it is murder, and that Gasonec is behind it. Taking up her father's work, Anna is supported by environmental activist Chris. They put their lives on the line to save the whales. A gripping eco-thriller and event two-parter!