 Felix Ragusa, an independent plumber, gets a major plumbing job at Carlos  casino, the job obtained through an introduction from Sister Bertrille. Because Felix has to run around to get supplies, he has to leave his sidekick, Tiger the dog, with someone. Felix leaves Tiger with Carlos, who in turn leaves him with Sister Bertrille. However Sister Bertrille admits to the sisters that she is hesitant to look after Tiger since dogs have a special attachment to her, and often forget their rightful master in the process. Tiger does seem to have a special bond with Sister Bertrille. When Felix returns after two days away, Tiger treats him like a stranger and runs back to Sister Bertrille. Despite the fact that Felix loves Tiger or perhaps because of it, Felix gives Tiger to Sister Bertrille. Felix is making major errors in Carlos  plumbing job since he is so preoccupied with thoughts of Tiger. Back at the convent, Sister Bertrille tries tough love with Tiger, to no avail. Ultimately, she discovers that Tiger is afraid of birds, so she takes a little flight in front of Tiger. Tiger runs back to Felix, just in time for both Felix and Carlos - Felix can now properly and quickly fix Carlos  plumbing job. As a gift, Felix gives Sister Bertrille another dog: Tiger s brother.