Guarda Streamingcommunity. When thieves turned undercover agents Mac (Ivan Sergei) and Li Ann (Sandrine Holt) must get inside access to an organized crime family, they discover the family's "godfather" -- a teenage girl -- is a deadly force to be reckoned with. This feature-length martial arts thriller is a reedited compilation of two episodes from the "Once a Thief" television series. Victoria Pratt, Nicholas Lea and Jennifer Dale also star.