Mary Lou (Lisa Schrage) wields her youth with the insane bravado of a biker on speed. She's prom queen and she'll sleep with whomever she wants, drink whatever she wants, and play her music loud and proud. Then her boyfriend burns her to death. A few decades later, sweet virginal Vicki (Wendy Lyon) finds Mary Lou's prom crown in an old trunk and shenanigans ensue. What kind of shenanigans? Well, the ghost of Mary Lou can't seem to decide how to kill a pregnant girl, so it chokes, hangs, and then throws her out a window. Mary Lou gets tired doing poltergeist shit so she possesses Vicki, shocking everyone with a very liberal attitude about her body. As the climax freight trains its way towards prom, you bet your ass everything goes Carrie and the body count rises. Depending on your point of view, Hello Mary Lou is either the greatest horror movie or a rip off of all the better horror movies. The effects hold up pretty well with special mention to the scene where Vicki gets sucked into the chalkboard. The acting by a crew of unknowns is amazing. The one deviant in the cast is Michael Ironside playing the older firestarting boyfriend of Mary Lou and father to one of the boys. A recognizable face only adds to the substance of the movie. The combination of silly slasher and psychological ghost horror gives the movie more legs that it needs, zooming along from set piece to set price. By the time Vicki makes her turn, the movie has more than given its entertainment value.
Breaking the mold of the normal slasher, Mary Lou creates a sense of unease through a lens of crazy "let's just do this next" that will leave you guessing and/or cheering through your first viewing.