When John Swift and Jane Graham uncover the Osiris Orb just outside of LUXOR, they learn that the mythical Stairway to Heaven is more real than they had first believed. Deceived by their power-hungry associate Seth Hisster however, now they find themselves tumbling through time and space in a race to keep history intact. Join the chase with John and Jane, meeting legends like Leonardo da Vinci, Amelia Earhart and Benjamin Franklin, as you battle against the clock to set things right!