After a disturbing freshman year at New York University, Mimi is happy to get away to her father's remote Canadian cottage, only to discover a stranger living there who has never heard of her or her father and who is convinced that Mimi is responsible for leaving sinister tokens around the property.

Seventeen-year-old Sam seems to have everything until she and her best friend, Cassie, disappear one night and now Sam has returned with amnesia, striving to be a much better person and aware that her not remembering may be the only thing keeping Cassie alive.

At Ellingham Academy, three people are now dead. One, a victim of either a prank gone wrong or a murder. Another, dead by misadventure. And now, an accident in Burlington has claimed another life. Stevie Bell knows who Truly Devious is-- or thinks she does. But David disappeared of his own free will and is up to something. The missing Alice Ellingham and the missing David Eastman. Somewhere in this place of riddles and puzzles there must be answers....

A tragic local mystery from the past is blown wide open when a girl from the poor side of town infiltrates a group of reckless, wealthy boys and uncovers more than she could have imagined.

Holmes and Watson may not be looking to reconcile, but when strange things start happening, it's clear that someone wants the team back together. Someone who has been quietly observing them both. Making plans. Biding their time. Someone who wants to see one of them suffer and the other one dead.