A girl is kidnapped the team investigates. Her father is in the military and is on a classified mission. They rule out ransom as the motive they think that it could have something to do with her father. But later another couple whose child goes to the same school gets a call from someone saying they have their daughter. But she's there so they call 5-O and they deduce that the kidnapper got the wrong child. When he calls and demands a unusual amount of money, they think this might not be about money. So they check it out and think it might have something to do with the couple's business.