An anonymous note in the middle of the night, an obituary for a banker who died in a hailstorm, and a mysterious woman vanishing down the stairwell: these clues lead Henry Alabaster and his uncle Kelvin McCloud to a spooky mansion in a coastal town. As a weather detective, Kelvin knows a thing or two about hailstorms, and then strange events surrounding the banker's death suggest foul play. Henry teams up with the fiery, artistic Rachel to help his uncle investigate, and they learn a lot about weather on the way. Nothing—not a thunderstorm, threats, burglary, a baseball bat-wielding suspect, nor even a devastating fire—can keep Henry and his team from chasing down the truth.