Haley's mother disappeared while on a trip to Iceland, and a year later, when her father takes her there to find out what happened, Haley finds herself deeply involved in an ancient saga that began with her Nordic ancestors.

Traveling with Dr. Iris Perez to Iceland to investigate activities attributed to local superstitions, the Alden siblings learn the legend of the mischievous huldufolk elves before uncovering clues that offer scientific insights into the strange phenomena.

When women in an Icelandic village buy chickens to lay eggs for them to use, the chickens follow them, adopting human ways and forgetting their barnyard roots, until the ladies hatch a clever plan.

There is a legend that if the ravens at the Tower of London ever leave then Britain will fall, so when somebody steals the birds, the Queen calls for Mac B. to find the thief and retrieve them--a mission that takes him to Iceland, where he encounters secret submarines, hungry polar bears, and his arch-nemesis from the KGB.