The King Tide

Infant Isla turns up one day in a shipwrecked boat, and is adopted and raised by the town's mayor Bobby Bentham (Clayne Crawford) and his wife Grace (Lara Jean Chorostecki), whose pregnancy ended in miscarriage shortly before Isla's discovery. However, it is soon discovered that Isla has healing powers to cure any ailment suffered by those who are near her, including Grace's mother Faye's dementia; swarms of fish also swim to her when she's in the water, thus protecting the town's food security because it guarantees that the local fishermen will always be able to catch fish they had long lost to larger commercial fishing boats from the mainland.