Six individuals have an encounter with aliens on an isolated road.

Turtle Wexler's family just moved to a new neighborhood, right next to the haunted Westing Mansion. On a dare from her new friends, Turtle sneaks into the mansion only to find the scene of a crime. It's the biggest mystery in the city's history. With a handful of clues and house full of suspects, Turtle gathers the evidence with her brainy partner Chris to cash in on a $20 million dollar reward.