It is a the ageless plot of Alfred Hitchcock. Kyle Pratt and her daughter return to America. Six-year-old Julia is a little worried about the future flight, and her mother, who is suffering a loss, tries to calm the baby. When the liner takes off, and Kyle sinks into drowsiness, the girl disappears without a trace. Julia was not on the boarding list, and her ticket. Under the pressure of the mother's hysterics, the crew ransack the salon, auxiliary compartments and toilets, but the search ends in vain. Performed by the ultra-modern "Boeing 747", Kyle Pratt unexpectedly without a trace disappears 6-year-old daughter Julia. The facts indicate that Julia was not on board at all. Realizing that to solve this mystery. The general sympathy for the grief of the unfortunate passenger is quickly replaced by alertness: obviously, no daughter simply was not, and the inconsolable widow is insane. Desperate to prove his case, Kyle realizes that she will have to save her kidnapped daughter herself. unknown to her.