Cheech and Chong sell enough of their "specially mixed" ice cream to finance their fondest dreams, new guitars, islands in the sun, beautiful women. While celebrating their wealth, Cheech meets his long-lost love Donna and accompanies her to her penthouse. Donna's boyfriend, an ex-con named Animal is on his way up. Chong unwittingly exchanges all of their money for a worthless bank check, and the only way to get it back is to escape into a nearby insane asylum.