The story takes place in the 42k era, after the fall of Cartier and Guilliman's awakening. The protagonist's stats aren't high, but his abilities are conceptually advanced. He starts by healing the sick and saving lives at the bottom of the hive, then becomes a space firefighter. He's either in a chaotic melee or on his way to one. The quack doctor will use his miraculous healing skills to protect the Emperor's loyal subjects. If life is the Emperor's currency, then Ivers is the one who mints that currency.

Saving people is awesome! Fighting is awesome!

Bring salvation and loyalty to a distant and dark future!

When you wake up from your sleep to find yourself in a damp, dark, muddy trench, surrounded by soldiers trembling and praying, clutching crosses. —"The Second Battle of Ypres? No problem, just put on your gas mask, you'll survive!" —"The Somme? We can only leave our fate to God." —"Is it the Verdun meat grinder? Oh well, God's useless now, dying is just a fresh start." —"Wait, what does it mean that Duke Constantine led the last of the New Antiochian Knights to resist the attack of the demonic army from hell? What the hell timeline did this put me in?"... In 1099, the Crusades conquered Jerusalem, inadvertently opening the gates of hell. From that moment on, the timeline changed, and human civilization entered a thousand-year dark age of fighting against the demonic army of hell. And Liston, who traveled to this timeline, was clearly a doctor saving lives, but...

My savior, the gods have chosen you to save this world! What? What world is this? This is the Warhammer universe! What? Which god summoned you? The Dark Prince Slaanesh, of course! In the name of Slaanesh, save the Warhammer universe!