Ben Brown leads a kayaking expedition across his home country of New Zealand. Travelling more than a thousand kilometers it is the ideal opportunity to tap into the 'flow', a meditative state where an athlete becomes at one with his surroundings. However this remote and exposed country is well known for its volatile weather - so when the dark skies unleash a torrential downpour, New Zealand's flowing rivers transform into wild raging torrents and Ben Brown's birthplace threatens to take the life of him and his friends.