Macy and friends meet new kid Miles, who joins their class assignment group. When an old newspaper and cryptic text lead the trio to the rebuilt time machine, they travel to 1910 and find a dead Macy!

Macy, Billie, and Zane return to the past, but find no trace of Morgue Macy! While searching for more clues, they find a confused Miles who accidentally time traveled to 1910 with them.

Macy, Billie, Zane, and Miles sneak into Station House No. 4 to destroy the weapon used to kill Morgue Macy. Tensions rise when they get locked in, and cracks begin to appear in their friendship.

Macy and Billie research the glitter clue, while Zane uses the time machine to redo his date with Sunny, accidentally unleashing a Victorian-era axe murderer.

Macy and Miles time travel to the past to retrieve William Murdoch’s pocket watch, while Billie and Zane get sidelined and become suspicious of Miles, causing a major rift between the friends.

After a major fight with Billie and Zane, Macy asks Miles to accompany her to an abandoned jail where, unbeknownst to her, her killer lies in wait. Billie and Zane investigate the killer’s note.

Reunited, the trio takes on the final clue which leads them to a nearby woodshop, where they find Miles talking to a mysterious man. They must find out who Miles really is and who he’s working with.

Macy must determine how to defeat James Gillies, William Murdoch’s nemesis, when he threatens that she must choose between her life, and that of her friends.