Something, or someone, is harming sea creatures, and as a result, the mer are at risk. India Finch, a part-human/part-mermaid, is called underwater to heal the animals. But simply healing the hurt is not enough. India is determined to discover who or what is causing so much pain, even if it puts her own life at risk. This hi-lo chapter book features a manageable reading level and a glossary and discussion questions to support the reader.