After solving their last mystery at Spooky Island, the Mystery Inc. gang is back in Coolsville, where they are being honored with their very own exhibit at the Coolsonian Criminology Museum. However, when a masked villain steals costumes of classic monsters on display and brings them to life, the gang must come out of retirement to solve the case.
A young girl buys an antique box at a yard sale, unaware that inside the collectible lives a malicious ancient spirit. The girl's father teams with his ex-wife to find a way to end the curse upon their child.
Americans Amy, Stacy, Jeff and Eric look for fun during a sunny holiday in Mexico, but they get much more than that after visiting an archaeological dig in the jungle.
