Because Jonah is one of the stolen children, he, along with his non-adopted sister Katherine, must help return the missing kids to their rightful places in history and fix time before it is destroyed.

The three come to realize that Jonah and Chip are important missing children from history who were transported to the 21st century by baby smuggling time travelers, whose names are Gary and Hodge.

They quickly discover that Chip and Alex's true identities are Edward V (king of England) and Richard of Shrewsbury, Duke of York, respectively.

But before Chip can enjoy being the King of England, they discover that they are virtually prisoners—and that the boys' uncle, Richard, Duke of Gloucester, wants them dead.

Posing as angels, they terrify King Richard by telling that his murder of his nephews means that he is condemned to hell, leaving him with a burden of guilt and terror of damnation that lasts throughout his reign.

JB soon shows up at Chip's house and explain to him, Alex, Jonah and Katherine that Chip was never meant to be king and that Richard III was meant to be a villain for the sake of furthering humanity's moral development, as the incident with his nephews had made the murder of children no longer acceptable as an option for those involved in governance.

JB then tells the four that he wants Jonah and Katherine to help the next missing child, Andrea Crowell, return to her place in history.

[10] [11] In this third volume of the series, Jonah and Katherine return Andrea, identified as the missing child Virginia Dare, to 1600, her correct time period from where she was kidnapped; she had been taken while in the process of burying the people and animals of the Lost Colony of Roanoke as per Croatoan Indian custom and had to finish the job, otherwise the island's legacy would poison relations between the Jamestown colonists who would be arriving in a few years and the local Native Americans and cause the colony to fail, creating major damage to history.

They discover that a man visited Andrea and wrongly convinced her to type in a code on the Elucidator which made it disappear, telling her it would take her back to the day her parents died, so she could rescue them.

[14] [15] Jonah and Katherine land on the decks of Henry Hudson's ship, called the Discovery, moments before a mutiny in the early 17th century.

They save their friends Brendan, Antonio, Andrea, JB and John White when Jonah rescues everyone from the fire in the Indian village of 1605.

Jonah and Katherine, still invisible, poke through the Einsteins' private papers after they go to bed, and then follow Mileva through the streets of Bern onto the train to Novi Sad in the morning.

Then Emily, one of the other girls from the time cave, appears in the room, telling Jonah and Katherine she was sent back by JB, who told her she would find out what she needed to know when she arrived at her destination.

Mileva, demanding that Jonah and Katherine cure her daughter, takes Lieserl and leads them out into the nearby woods; she uses the Elucidator to render them visible and is chagrined to find they are only children.

Jonah lets Mileva keep the Elucidator when she returns to her time, which allows her to later send her demented son, Tete Einstein, to the future as a baby, where he grows up to become JB.

[21] [22] Right after Jonah, Katherine and Chip meet a girl named Daniella McCarthy, the four are kidnapped by a boy, Gavin Danes, and sent to 1918.

Everybody except Chip is arrested upon arrival, who rescues Jonah and Katherine and discovers that Yakov Yurovsky intends to kill the Romanovs.

Jonah discovers Gary and Hodge's plot: they convinced a grief-ridden Charles Lindbergh, reeling from the kidnapping of his son in 1932, that Jonah is his son and that he could have him back if he went to the night of the time crash and took the plane of babies to the future, cleaning up their mess and creating separate dimensions (and, in their plan, unaging Lindbergh himself as well).

Staying true to its name, Jonah's real identity as a missing child is finally "revealed" in this book; an orphanage baby from 1932 who was kidnapped to be passed off as Charles Lindbergh's son.

They learn Second's story: having witnessed the appearance of the plane, he was kept on for the FBI investigation, but crippled from his accident, and Gary and Hodge, acting for Interchronological Rescue, hired him as a spy in the time agency for the company, taking him to the future and healing him, where he became JB's chief projectionist.

Second reveals that he has been murdered and that he is only a hologram, and the fate of the alternate universe he created- destroyed, since he gave the secret of age-altering to everyone.

The two are captured by Curtis Rathbone, the CEO of the company that employed Gary and Hodge, who then reveals that he caused all the unaging.