Chapter Three: "The Keepers of the Keys" - With the Timeshift Key in their hands, the past is an open book to the Locke children. It's time for answers; it's time for the truth. And now that Dodge knows where Tyler has been hiding the key to the black door, time is running out...

As Kinsey Locke and the other students head to a dance at Lovecraft Academy, the demonic Dodge gathers shadowy forces of his own and enacts his evil endgame. The ''Last Dance'' begins here.

'Clockworks,'' Chapter 5: Lucas "Dodge" Caravaggio returns from the Drowning Cave, infected by a parasite of the soul; the good and loving friend has been left behind, and replaced by something free of all human feeling. Searching for a way to control him, the Keepers of the Keys make a dreadful choice... and set off a chain of events that will end in an unimaginable slaughter.

Colonel Adam Crais's minutemen are literally trapped between a rock and a hard place; in the first days of the Revolutionary War, they find themselves hiding beneath 120 feet of New England stone, with a full regiment of redcoats waiting for them in the daylight... and a door into hell in the cavern below. The black door is open, and it's up to a 16-year-old smith named Ben Locke to find a way to close it. The biggest mysteries of the Locke & Key series are resolved as Clockworks opens, not with a bang, but with the thunderous crash of English cannons.

Chapter Four - Human Sacrifices: The bottomless pit of the Drowning Cave threatens to become a mass grave, as Dodge springs a fatal trap on the senior class of Lovecraft Academy. Hope is as fragile as a candle-flame wavering in the night... and as easy to extinguish.

As a storm thunders up the coast to Lovecraft, Massachusetts, the Keepers of the Keys face Dodge a final time, under three hundred feet of stone, in the darkness before the Black Door. Here, water will mix with blood and The Drowning Cave will become a colossal grave, in the final issue of the CLOCKWORKS storyline.

The sprawling tale of the Locke family and their mastery of the whispering iron thunders to new heights as the true history of the family is revealed to Tyler and Kinsey. Zack Wells assumes a new form, Tyler and Kinsey travel through time, and surprises beyond imagination will be revealed.

In the Drowning Cave, the black door is open at last, and for the kids trapped down there, the choice is simple: resist and die, or pass through the door and be lost forever. In the hole beneath Keyhouse the stones run with blood, the living shadows run riot, and time runs out... as Locke & Key enters its final chapters.

A ghost haunts the long halls of Keyhousethe spirit of Bode Locke, cast out of his body by the Demon named Dodgeand only one person can hear his voice: Bode's old playmate, Rufus Whedon. It's time to soldier up: the final battle for Keyhouse is about to begin.

A season of lies and murders has come to a head; the shadows rise and the water falls, as Dodge approaches the Black Door... with the Omega Key in his possession and nothing left to stand in his way.