When Jessica gets a job at the London City Observer, she expects a demanding editor to be her biggest threat. Instead, she finds herself caught up with ghosts and premonitions lurking behind every corner. Can she find the truth before her deadline?

Sleeping together as a team, Saya Hokage and her newfound group of Sleepwalkers excel at hunting Suiju – being that possess people’s spirits in the land of sleep. Until an unexpected darkness appears… Will the girls be able defend humanity's sleep?