The white dolphins vanished for two years, and you found a fishing net in the bay. – intro video

You’re a researcher from Hanoi’s marine institute, come to Ha Long Bay to find out why the white dolphins have vanished for two years. On the boat you’ve chartered, the female captain tosses the mooring line to a man on the dock and grins from ear to ear: “Let’s get one thing straight. Once we leave, you can ask me anything you like, but don’t ask the sea.”