New Zealand's first Tongan swimming champion battles self-doubt and setbacks as she fights for a medal at the Commonwealth Games. A traumatic childhood accident left Tupou Neiufi with a permanent disability. But in the water, she feels invincible. Already a world champion Paralympian, Tupou has the Commonwealth Games podium firmly in her sights when self-doubt and some unexpected hurdles make her contemplate quitting the sport for good.