Actually, his life was saved by a kind (?) mobster, to whom he pledges fealty like a Zi-Samurai ("one who serves").Ghost Dog, a down-on-his-luck hit man, gets hired by some mobsters to do a job, only to find he's been double-crossed.
"The Book of Samurai" is supposed to be a Japanese text, but is fictional.After realizing that he is the target of the next hit, Ghost Dog consults his bible, the Chinese warrior mantra known as the "Book of Samurai," to knock off each of his adversaries in unique and humorous ways.