The screening is especially significant for Herewini Whakarua's great grand niece, Virginia Hina, who was able to welcome her tipuna home when the memorial restoration was completed in June 2015.
"My great grandmother and his father were brother and sister," said Ms Hina.
"I discovered that in 2009 thanks to my late auntie Hinekura Phillips - my personal whakapapa guru."
Film-maker Kevin Double became part of the story when he met stonemason Marco Buerger, who was working on the memorial restoration at Pakaitore.
Mr Buerger was one of the Goldfield Stone team from Christchurch and he put Mr Double in touch with the Pakaitore Historic Reserve Board.
The board would become executive producers of Set in Stone and chairman Jay Rerekura would become the film's narrator.
There are many familiar Whanganui faces in the film, which screens on Wednesday night.
Reserve a seat by visiting visit Set in Stone or call the producers at 06 281 3474. 300 only