The Delaney family seems happy but Joy disappears, forcing her husband and four adult children to reassess their family history.

In the small town of Speedway, Indiana in 1978, four young employees of a Burger Chef restaurant went missing at the end of a Friday night shift. The police initially suspected a petty theft by the work crew. By the time their bodies were found on Sunday and the investigation elevated to multiple murders, the crime scene had been cleaned and re-opened for business.