Shadowsea

In the fourth and final Cogheart adventure, Lily, Robert, and their mechanical fox Malkin travel to New York for a holiday, only to be drawn into a dangerous mystery when a strange boy begs for their help. The trio discovers chilling goings-on beneath the city's bright streets, including a shadowy professor with a treacherous plan. As they follow clues through the bustling metropolis, they must outwit enemies and rescue the captive boy before it's too late.