Rex Mundi is a mystery set in a 1930s Europe where sorcerers stalk the streets at night and the Church never lost its grip on power. Master Physician Julien Saunière must uncover the two-thousand-year-old secret of the Holy Grail before all the world is drenched in blood!

In #5: Julien is pushed to the edge of madness. Paris erupts in flames and violence. And Lorraine's fragile relationship with his daughter is shattered forever.