Emilio Colmenar

Cosme, a 15-year-old boy, sets his sights and his libido on his new neighbor, Merche. After giving her a lift on his moped, and getting a glimpse of her underwear, he begins to look for excuses to wander next door. He manufactures illnesses to stay home from school and uses his free time to ogle her while she sunbathes outside. His efforts to sustain a relationship that leads to the bedroom are hampered by his amusing family, sabotaged by the maid, and jealously noted by his high school girlfriend.

Sister Angela and Sister Mary park his van in front of a bank branch. They enter the bank and with the weapons hidden under their habits, commit the robbery of the century, to the astonishment of all employees and customers. After thorough police investigation the two nuns are arrested, but then appears Trini, twin sister of one of them and now all is not so clear. Were the nuns who committed the robbery?