In the wake of tragedy, the Omega Rangers return to Angel Grove to reunite with some familiar faces from their past. Trini finds herself confronted by the nearly impossible challenge of balancing her life as a Ranger, and her responsibilities to her family. To make matters even worse, Safehaven faces an alien invasion; and they're after something that should never be unleashed! What horrors are sealed inside of the ancient container buried deep within the OMEGA VAULT?