A notorious rebel finally gets released from deadtention only to find another ghoul has taken up residence in his old haunting grounds.
Johnny Spirit, the troublemaker with the worst reputation at Monster High, has sat through three thousand years of detention and is allowed out today. His impending release is the cause of much commotion among the students. Operetta is an exception of sorts: she is not convinced that Johnny lives up to the name, but the fact he used to hang out in the catacombs before Operetta enrolled and made them her own has her worried.
The trouble starts the moment Johnny Spirit leaves detention, though he is only partially to blame. Most students run away screaming at the sight of him, which he does not promote nor mind in the slightest. During lunch, Toralei, Purrsephone, Meowlody do try to socialize with him because they view him as a peer, but Johnny curtly tells them to take a hike.
Later that day, Johhny returns to the catacombs when Operetta coincidentally is elsewhere and starts redecorating the place to suit his tastes once more. When Operetta hears music coming from below, she rushes downstairs to chase Johnny out. The two find each other to be equally dead set on having the place, so Johnny proposes they musically compete for it. Operetta confidently steps to her organ while Johnny takes out his violin. Unexpectedly, the two are equally skilled and they enjoy the competition as a jam session. Johnny calls a draw on the match, which Operetta raises to a best two out of three. Amused, Johnny suggests they make if a best five out of nine.
- Operetta has a poster up of Crescenda von Hammerstone, her idol whom she got to meet in "Hickmayleeun".
- Johnny Spirit makes his cartoon debut.
- "Playing the Boos" was initially scheduled for a dual release with "Inscare-itance" on December 5th, but wasn't uploaded until the tenth on the Monster High website, which coincided with the addition of the first five Volume 4 webisodes to the website.
- "Playing the Boos" was announced as "Spirit Without a Cause", a reference to the 1955 USAmerican movie Rebel Without a Cause.
- Upon his transformation to Holt Hyde, Holt uses the same animation as he used for that same occasion in "Here Comes Treble".