A cover-up imperils Laura, hiding out with Rich in a California cove, where she makes disturbing finds on the creatures from Cirko's files. Elsewhere, a frantic Miles flees with Nim in a getaway that embattles him with cops and forces him to make an emotional decision.

As Laura and Rich struggle in their submersible, they're horrified to discover that the mysterious species is laying thousands of eggs underwater. Meanwhile, Miles suspects Nimrod is to blame for a vicious attack on the docks.