Curse Of The Possessed Bus

A plot for revenge goes wrong when a bus full of seven people rolls down a side of a mountain killing everyone on board! The bus was taken to a junkyard to be scraped, but the shady owner of that junkyard had other ideas! He managed to repair the severely damaged bus and ended up making a profit on it.
The bus ended up being purchased by the new owner of the bus company that the bus had originally come from! The same company where two of the victim's daughter-in-law works at.
The daughter-in-law ends up becoming the driver of that bus and to her surprise, she discovers that all seven of the victim's spirits are trapped on that bus and can't move on to the afterlife until they complete their unfinished business with the help of a living soul!
Will the trapped souls receive the help they need to move on and get off that bus? Or will they be imprisoned on that bus for all eternity?