Flying at 40,000 feet in a state-of-the art aircraft that she helped design, Kyle Pratt's 6-year-old daughter Julia vanishes without a trace. Or did she? No one on the plane believes Julia was ever onboard. And now Kyle, desperate and alone, can only count on her own wits to unravel the mystery and save her daughter.

Mollie and James are together and raising a family, which now consists of an older Mikey and his baby sister, Julie. Tension between the siblings arises, and as well with Mollie and James when Mollie's brother Stuart moves in. Mikey is also learning how to use the toilet for the first time.

Alex Corvis returns to the world of the living to avenge the murder of his girlfriend, who he was wrongly accused of killing. But first he must uncover the truth about who really killed her.

A martial artist agrees to spy on a reclusive crime lord using his invitation to a tournament there as cover.

With their father away as a chaplain in the Civil War, Jo, Meg, Beth and Amy grow up with their mother in somewhat reduced circumstances. They are a close family who inevitably have their squabbles and tragedies. But the bond holds even when, later, male friends start to become a part of the household.