Doraemon's Long Tales (Doraemon's Long Tales #12)

Noby and his gang create a world of their own up in the sky: the Kingdom in the Clouds. One day, they meet the inhabitants of a different sky world. The Sky People are friendly at first, but their suspicious behavior prompts Noby and the gang to attempt an escape. However, they are soon overtaken and attacked by their pursuers. Noby becomes separated from his friends and is left alone with Doraemon, whose robotic functions have been rendered useless by the attack. Noby then learns that the Sky People have a horrifying plan in mind: Project Noah, a plan to flood the Earth and wipe out its people! Alone and unable to depend on Doraemon, can Noby stop the Sky People before it's too late?

A cloud-soaring adventure, the 12th tale of the Doraemon's Long Tales series!