The Neptune promise
"Genetically engineered to live in the sea, Nere Hanson and her friends face daunting new challenges as they race to find a solution to climate change. Nere must begin training for a dangerous new mission: diving deep into the black, cold Twilight Zone to salvage a research ship that sank in mysterious circumstances the day Dai Kurons mother died. This salvage mission becomes even more perilous when the Sea Rangers spot shredders and a silver sub lurking outside of Safety Harbor. Nere and her team may have to face Whitey, Wasp and Ran Kuron once again, but whose side is Dai Kuron really on?"--