During one lunchtime at an offbeat London coffee house the relationships of the quirky staff & several couples are suddenly turned upside down by revelations of supremely embarrassing secrets & idiosyncrasies generally having to do with their rampaging sexual appetites. ; ; A neurotic young commitment-phobe runs into his ex-girlfriend while hes whacked out on killer dope. ; A high strung control freak finds out that her husb&-to-be is a transvestite. ; A shy hesitant young woman suffers the blind-date-from hell: an obnoxious boor who has been told she sleeps with men on the first date. ; A hyper-possessive boyfriend discovers that his girlfriend is an ex-porn actress. ; & the managers boyfriend has a menage a trois which he says is forgivable because the girls were identical twins. ; As the craziness builds to hilarious conclusions Caffeine interweaves these characters hapless attempts to repair their fractured relationships while they are forced to confront issues of fidelity betrayal commitment & forgiveness.