Annie Schrijver is just twenty-two-years-old. She works in the picturesque Albert Cuyp flower market where her father has a stall. Brimming with personality, she's always been popular with the customers. But then she goes missing, only to be found barely alive, tied to a stone angel in a graveyard, surrounded by a ring of fire. Her body contains traces of a drug which connect the police to a previous case: the Sleeping Beauty murders. But Annie seems to have been the lucky one, as a body is found nearby, freshly tattooed with three words: Sleep Baby Sleep. It is summer and Amsterdam is full of tourists drunk or high on all that it has to offer. The drum of music from a make-shift DJ booth near the zoo is deafening, and empty frites cones and beer cans litter the streets. But the atmosphere has sinister undercurrents as a killer is at work in a city where crime pays and tensions run high. Detective Pieter Vos knows that if he is to outwit the murderer, he will need to employ everything he has to avert a greater tragedy.