The messages referred to in the title are those conveyed on a Ouija board. The heroine (Kathleen Beller) conjures up these messages, which indicate that her future happiness is gravely in doubt. In point of fact, the words she spells out on the board are I-AM-GOING-TO-KILL-YOU. A mystery figure from the woman's past intends to fulfill this prophecy--with a dagger. Material like this only works if the producers have faith in it; Deadly Messages appears to have been made by people who found the premise amusing.