In an alternet 1987 Doctor Brown's delorean was posted by the ghost of the black knight who traveled back in time to kill king Aurther and take over the world with fucteristic to him technology so Doctor emit brown, Marty mycfly, doctor peter venkman, docter egon spengler, doctor raymond stantz, Winston Zeddemore and you the time traveler from our modern day in this alternate 80's nostalgia story must travel back in time in the new ecto 1.5 a flying time copy of ecto 1 modafied with a mr. Fusion, flying car tech and a flux capacitor must travel back to save the past to save the future!