Kiko Goifman always knew he was adopted. At age 33 he finally decides to undertake a journey to find his biological mother, and film it as a documentary. He starts off with the few facts he knows, aided by two private detectives, his adoptive mother, and his wife. He also writes an online diary detailing his activities and findings, which gives him additional tips. The title 33 not only refers to Kiko's age, but also to the famous film noir ".33", the age of Christ - "like Kiko - a Jew" , and other coincidences involving the number 33.