When Connor Tempest and his swashbuckling pirate buddies get a rare break in their duties, they're in the mood for fun, sun and adventure. A chance meeting with the crew of The Lorelei seems to offer all that and more. Soon, Connor and co are learning to freedive into the amazing world far beneath the ocean's surface. But the pirates are further out of their depth than they realise. Under the water, danger is lurking - and it's going to take everything they've got to get out alive...