Time Travel the Mother Road.

When the spring of 1946 comes, severe depression causes Katherine Callahan to leave her loving husband and newborn baby to embark upon a journey across the famous Route 66 from Chicago to her sister's home in Burbank. She never arrives.

Fast forward to the present, Kevin Callahan, Katherine's grandson, along with his best friend, Cheryl Bachman, traces Grandma Kate's steps along the now decommissioned road to uncover the mystery surrounding her disappearance. They are armed with only a handful of postcards from Katherine and a Victorian secret code involving postage stamps surrounding a mysterious man from her past. This, along with Cheryl's detective skills and an unusual, paranormal connection between Kevin and his grandmother transcends time itself, bringing them closer to the truth as Kevin and Cheryl find themselves back in 1946.