The following details are from a Bandai Namco press release:

Three years after the events of GOD EATER: Resurrection, a mysterious red rain sparks a fatal pandemic called the Black Plague. With no established cure, this scourge has a mortality rate of 100% once infected. Members of the Special Unit “Blood”, an affiliate of the Fenrir Organization, are sent to assist and investigate. Take control of their newest recruit as you master incredible weaponry, challenge enormous monsters, and cooperate with an iconic cast of characters fighting for humanity in GOD EATER 2: Rage Burst.

Digital only on PlayStation Vita and Steam