There are different movies with the same name. Some are with Samuel L. Jackson. They are not called 1, 2 or 3, so you have to tell them apart by year of launch and director.
In a way the main character in this version is the son of “Shaft”, Samuel L. Jackson. Shaft is a former police officer who became a private detective with a reputation. Junior’s highschool friend is found dead and when he wants to find out what happened, he turns to his estranged father.
Shaft mostly sees a white boy, spoiled by his mother. Also in his son’s request he sees an opportunity to right an old wrong. So the fast talking menace of the New York criminal milieu sets out on a mission.
Some action some humour, somewhat amusing.