Dan the Worm has a case for Snoop and Sniffy after spotting glowing Neon Orbs moving across the sky at night. Could something sinister be behind this magical occurrence?

Snoop and Sniffy are recruited by Finn to investigate a mysterious echoing noise in the Pflugerville Tunnel. What could be making this sound? It’s time for Snoop and Sniffy to enter the tunnel and find out!