“Ancient Rome has suffered its worst drought in centuries. A ruthless emperor has declared the gladiatorial games will continue nonstop until the rains return. The nightingales, a grisly race of creatures, are drawn to the dead and dying. You enter the fray just as the rain begins to fall, recoiling with fear and disgust as the ravenous nightingales feed. Try to survive alongside gladiators, but with nothing to protect you, you’re history.”
The descriptions on the Uni Orlando website (not the HHN site) tend to add another detail or two.