Now attached to French intelligence, Romane is training hard with agent El Malik and Delph, a genetically modified Dolphin with extraordinary mental abilities. The goal of their coming mission: to infiltrate the premises of Algapower, the company at the heart of their investigation, and find clues as to its actual activities – in particular the mysterious Mermaid Project. What is the aim of Algapower's genetic research? Time is running short...