Rumors arise of a man named Grimm Holloran, a doorman with a strange personality. Grimm warns the Ross children not to trick-or-treat on the 13th floor because there are dangers beyond understanding. Too brave and cocky to believe in such words, Luke decides to trick-or-treat on the 13th floor with Zuri, despite Emma and Ravi's deep fear of Grimm's warning. Meanwhile, Jessie plans to submit her story to a famous newspaper journalist. Unfortunately, her abnormal tactics cause the Ross children to believe that she is a bloodthirsty maniac waiting to kill off anyone in her path. Tony tries to calm her down throughout the episode, but to no avail.