After tasting the good life with JC, Ava crashes a swanky tech party with his friends. Mary goes gunning for the people behind the attack on her sisters.

Ava takes her first steps toward understanding the halo's power, but a baptism by fire at the hands of the Order leaves her feeling burned.

As Ava contemplates starting over, she recalls being left to the tender mercies of the orphanage. The Sister Warriors suit up for a dangerous mission.

While Mary squares off with Sister Lilith, Ava begins to open up to JC, and Jillian Salvius fires a warning shot at the Church.

Hoping to find some answers, Ava puts her faith in science. Meanwhile, Cardinal Duretti's machinations sow seeds of dissension inside the Order.

"The weapons we fight with are not the weapons of the world. On the contrary, they have divine power to demolish strongholds. "

Infiltrating the Vatican to find a tomb hidden deep underground for a millennium? Hell, Ava may need a miracle to pull off this mission.

"Do not be afraid of what you are about to suffer. I tell you, the devil will put some of you in prison to test you, and you will suffer persecution for ten days. Be faithful, even to the point of death, and I will give you life as your victor's crown."

In shock over the contents of the tomb, Ava no longer knows what — or who — to believe as she tries to divine the true history of the halo.

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.

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

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.