In London's Belgravia, Tamsin lives next door to Edie St Clair, famous author of the ‘London of the Bells’ series of graphic novels. With the series’ tenth and final novel overdue, Tamsin offers her idol help and discovers that Edie can literally draw herself into her stories. When Edie goes missing, Tamsin draws herself into the novel and lands in a world of unexpected danger. There, Tamsin discovers that Edie needs her more than she could have realised – only she has the power to write the perfect ending to this story. But the perfect ending will come at a great cost to all.