Not all secrets are buried deep . . . enough.

Chris Black has spent two decades searching for answers deep within the world's oceans and is no stranger to the risks of undersea life. Alongside Mac Johnson, his childhood friend and former Navy SEAL, Chris has cheated death above and below the ocean's surface more times than he can count. But nothing has prepared him for the violence he and his team encounter in their own backyard of Carmel-by-the-Sea, violence which will change the team forever.

When Black and Johnson, while studying a deep undersea canyon, discover barrels of toxic waste piled on the seafloor, they immediately grasp the danger to the environment. But they are slower to recognize the danger their discovery poses for their friends and families.