Retirement was supposed to bring Bill a quieter life. But when an old friend o ers him a well-paid diving job at a mussel farm in Ireland, the opportunity is too good to pass up. What begins as a routine underwater inspection soon raises unsettling questions. Why does such a simple job require an outside contractor? And what is really inside the numbered red sacks Bill has been asked to recover? Beneath the calm waters, Bill is about to discover that some assignments are not as straightforward as they seem.