Hannah Bryson

Hannah Bryson is a marine architect who's been given a fascinating assignment. A Russian nuclear submarine called The Silent Thunder has been purchased by the United States for exhibition in a museum. Hannah must create a schematic of the sub to check for hazards and design seamless modifications to make it safe for the thousands of expected visitors. But soon she discovers that she's being used as bait.

While mapping the ancient underwater city of Marinth in the Atlantic Ocean, submersible designer Hannah Bryson makes a shocking discovery: she may have finally uncovered the truth about the once-glorious city’s mysterious demise. Long ago it was a thriving metropolis bursting with culture and life – Marinth’s sudden disappearance has plagued scientists for years.