The film's hero, Lola, is getting ready for the celebration of her birthday. Because she knows she is in for a surprise, she lets two strangers with flowers and a cake into her apartment. The guests names are Bim and Bom; they are killers. They've chosen the girl's apartment as a shooting place to assassinate the president whose motorcade is to proceed by her house. Lola becomes a hostage and the main obstacle foiling the assassination plan.