Lucy longs to keep her special link with dolphins, and hates her Dad for telling her that she will grow out of it and lose her gift. Yet despite her efforts it looks like her father will be right. A painful accident gives her what may be one last glimpse of that world beneath the waves and the chance chance to spend time with Spirit. Yet there are clues to her mother Megan's own link with dolphins that sends her on a quest to discovery the real reason for Megan's death and what links them both to a Victorian girl called Mary. The answer lies in the Trinity Caves, but will she ever find them before the stars align at Christmas?
This is the exciting conclusion to the Dolphin Child trilogy. 'The Girl Who Dreamt of Dolphins' saw Lucy discover her gift, and 'Dolphin Child' saw Lucy come closer to Spirit, before realising that her gift seemed set to fade away. 'Midnight Dolphin' sees Lucy struggle to find her own destiny, even as those around try to protect her from it.