In the quiet streets of Prague all manner of mysterious creatures lurk in the shadows. Unbeknownst to its citizens, their only hope against the tide of predators are the dauntless lamplighters - secret elite of monster hunters whose light staves off the darkness each night. Domek Myska leads a life teeming with fraught encounters with the worst kind of evil: pijavice, bloodthirsty and soulless vampiric creatures. Despite this, Domek finds solace in his moments spent in the company of his friend, the clever and beautiful Lady Ora Fischerová - a widow with secrets of her own.

When Domek finds himself stalked by the spirit of the White Lady - a ghost who haunts the baroque halls of Prague castle - he stumbles across the sentient essence of a will-o'-the-wisp captured in a mysterious container. Now, as its bearer, Domek wields its power, but the wisp, known for leading travellers to their deaths, will not be so easily controlled.

After discovering a conspiracy amongst the pijavice that could see them unleash terror on the daylight world, Domek finds himself in a race against those who aim to twist alchemical science for their own dangerous gain.