Oma kolmandal aastal Sigatüüka Nõiduse ja Võlukunsti Koolis tuleb Harryl, Hermione'l ja Ronil vastu astuda võlurite vanglast pagenud vangile, Sirius Blackile. Sirius Black pandi 12 aastat tagasi Azkabani kui Lord Voldemorti parem käsi. Nüüd arvatakse, et Black kavatseb Harry Sigatüükas kätte saada ja ta tappa. Nagu sellest ohust veel vähe oleks, pannakse kooli valvama tontlikud dementorid, kes suudavad inimesest kõik rõõmsad tunded välja imeda.

Nice Dreams - it rhymes with ice creams. And that's what Cheech and Chong are selling in this thoroughly wacky comedy. The outrageous, permanently spaced-out duo sells enough of their "specially mixed" ice cream to take the cash and realize their fondest dreams: new guitars, islands in the sun and beautiful women. But, of course, not everything goes as planned. While celebrating their wealth in a new wave Chinese restaurant, Cheech meets his long-lost love Donna, and promptly escorts her to her posh penthouse. He soon learns, however, that Donna's boyfriend, an ex-con named Animal, is on his way to her boudoir. Meanwhile, Chong has unwittingly exchanged all their money for a worthless bank check - and the only way to get it back is to escape into a nearby insane asylum.