In a world where angels are fierce stalkers whose irresistible force allows them to feed off humans and drain them of their vitality, a ruthless teenaged assassin of angels falls in love with a half-angel half-human girl, with devastating consequences.

When Liliath, an immortal practitioner of angelic magic, awakens after a century of sleep, she resolves to reunite with her Ystara archangel lover, Palleniel, and enlists the help of four young people to complete her task.

Seventeen-year-old Karou, a lovely, enigmatic art student in a Prague boarding school, carries a sketchbook of hideous, frightening monsters--the Chimaerae who form the only family she has ever known.