The Drowning Signal

They were never supposed to be trapped together.
When a sabotage attack cripples a remote marine research facility, behavioral scientist Aria Vale and security contractor Cade Mercer are sealed inside a suspended observation tank - with orcas below them and sharks circling above.
Communications are dead.
The structure is failing.
And someone inside the station wants the evidence buried at the bottom of the ocean.
Survival means trusting each other.
But the deeper they go, the clearer it becomes:
The real predator isn't in the water.