At the annual May Ball, a jubilant celebration marking the end of examinations at Cambridge, private investigator Laura Principal is hired to provide security. Then, somewhere between the dancing and the fireworks, a student disappears.Katie Arkwright wore white, a vision of purity. But when Laura starts probing into the missing woman's life, she finds that Katie concealed a dark side. The deeper Laura searches into a tangled past, the more tension mounts in every corner of Cambridge--where someone waits, coiled to strike. And strike again.