Ava visits the other realm and returns with a new plan to end Adriel's unholy charade — but it will require superhuman strength and painful sacrifices.

After an intense battle, Ava's halo saves a life, while one of Adriel's followers has a crisis of faith. Camila finds herself behind enemy lines.

The Order and their allies prepare for a showdown against Adriel at his new cathedral, but learn their adversaries have been making plans of their own.

Seeking Lilith's whereabouts, the sisters and Miguel visit Jillian. An unnerving discovery upsets Camila. Conflict erupts over Adriel at a conclave.

As a bizarre plague sweeps the city, Ava uncovers new revelations about Miguel — and Adriel's methods. Lilith explores new possibilities.

After the Order sends out an urgent call, Beatrice and Ava connect with old friends in Madrid and stop by a museum. Jillian investigates an anomaly.

A mysterious nun makes contact with the OCS, while Adriel proposes a partnership to the pope. Lilith turns to an unexpected source for help.

Ava and Beatrice jump into action when they meet an ally eager to take down a self-proclaimed prophet and his followers. Tragedy strikes at the convent.