The Heiress of Water by Sandra Rodriguez Barron

When young Monica Winters Borrero loses her luminous mother in an accident at sea, she is exiled from the tropical paradise that was her home. Grieving and cut off from a life among El Salvador's elite, Monica and her American father move to Connecticut, vowing never to look back.

Years later, an intriguing stranger, who has endured a terrible loss of his own, enters Monica's life, bearing an unusual request. Monica is propelled back to her lost world, retracing the shadowy last days of her mother, a marine scientist who had been on the brink of understanding the therapeutic applications of a rare, venomous sea creature. Now, her research is being corrupted by a secret clinic that claims the power to restore consciousness to the comatose.

What Monica discovers will shatter the family's delicate truce with the past, and compel everyone involved to challenge their deepest notions of what it means to be alive. Atmospheric, thought-provoking, and timely. The Heiress of Water is a stunning parable of paradise lost and found.