In the dead of night, creatures emerge from the inky blackness of Lake Erie and lay siege to the city. A hundred thousand coelacanthian humanoids (think Shadow over Innsmouth maybe?) descend upon Cleveland, wreaking watery vengeance on everyone in their path. A large group of students manage to survive, taking refuge in the tunnels, dorms, and underground labs of the Case campus. What will they do to survive, and what dark secrets might those laboratories hold to fight back against the icthyic hoards?