Gregory High School students perform the play Murder Can Be Habit Forming

Handyman Herman (Jaden Graber), Professor David Lewis (Jamison VanderPol), Wilma Patterson, the husky bus driver (Piper Bartlett), and Torch, the punk rocker (Eli Fogel), arm themselves with gothic weapons from the walls of the ancient convent to go in search of “The Mary Murderer.” But that suit of armor in the corner looks suspicious.

Everyone is shocked to learn that Detective McDougal (Luke Barreto) is the Mary Murderer, as Mary Adams (Lily Jacobsen) explains how she hid undercover as a suit of armor while Mary Bishop (Kate Weborg) lured him into their trap.

Mary Bishop (Kate Weborg) and Mary Adams, an undercover police officer (Lily Jacobsen), hatch a plan to catch the murderer.