A student bikes home from her boyfriend's house and is never seen again.
A young man who overcame a devastating brain injury enters a taxi and never resurfaces; police are at a loss until they receive a mysterious text that pivots the case in a new direction and intensifies the race to bring Julian Williams home alive.
A young mother is murdered and dumped in an alley; police have plenty of suspects, including her former beau, but the trail soon runs cold; a ghost from the past suddenly reappears, giving the family renewed hope for justice.
A Florida psychiatrist and his son are shot dead; their home ransacked; investigators suspect robbery until they realize that only a gun and a car are missing; they must work backward to uncover a motive so they can track down a killer.
Drew Cato breaks up with his lover and disappears; police search the area to no avail, but the plot thickens when they interview his son's mom; as the search drags on, Drew's secrets come to light.
Business owner Larry Hughes goes missing from his Pulaski, Tenn., home; it takes a quarter-century to solve the case.