As much as I love the early ’80s for the explosion of horror movies, I must still acknowledge that for every Basket Case or Sleepaway Camp, there’s going to be a One Dark Night to temper my expectations.
There’s this guy, and he was apparently a semi-famous mentalist or whatever, and people wanted to prove he was a fraud, but other people thought he was for real life. Only he died, and a whole bunch of people were also dead in his apartment with him, and maybe he murdered them, but he’s dead too, so… whaaaaat?
And the guy has a daughter, who is married to Adam West, and some other guy who’s been lurking around the crime scenes wants to tell her about her dad, and how he was, in fact, for real life and not a fraud at all, but also maybe totes evil, which I suppose tracks with all the other dead people in the apartment, but since he’s dead too, who cares?
But then there’s a sorority hazing in progress, only I think it’s high school and it’s just three chicks in matching members only jackets instead of a sorority, and for the final hazing, the head sorority chick wants to send the prospect chick, who she hates because she (the prospect) is dating her (the head chick) ex-boyfriend, to an overnight in the mausoleum from Phantasm. Why the prospect chick thought it would be a good idea to join this not-exactly-a-sorority is not really explored with any rigor.
Speaking of rigor, though, it turns out that the mausoleum is where the dead evil mentalist guy is entombed, and now you see why the two unrelated plots are in the same movie. Except you’re wrong, because while the high school horror movie makes sense, the dead evil mentalist story never makes even the slightest lick of sense, and I think I’d rather have seen either a different and more traditional spend the night surrounded by the dead while other people want to prank you possibly to death, or else just gone ahead and watched Phantasm, which also doesn’t make a lick of sense, but man it does it with a lot more style.
 A fact that never rises to the level of even moderately important to the plot, but since at one point after his Batman fame ran out, he was considering taking a job as a human cannonball, this counts as good news for his career. Which… hooboy.
 By which I mean, if she had been unmarried, nothing would have changed. Much less if it had been someone besides Adam West.