Doc Marcelo, always eager to examine more than just symptoms, finds himself face-to-face with the shy and innocent Celestina. Pretending to compare her vaginal contractions, he skillfully brings her to the brink of orgasm with his fingers and tongue. Celestina, overwhelmed by the illicit pleasure, can't help but reciprocate with a timid yet eager blowjob. Their passionate 69 session is cut short by a security camera, forcing Marcelo to bribe the guard for their secret to remain unsullied.