A war between spirits and humans

Humans from the intergalactic civilization of Bahjahpur try a colonization of Gerdraïa planet that seems quite inhabitable. However, they face electrical phenomena that they do not understand and end by giving up a first time.

Several years later, a second attempt takes place, which, after a promising start, also fails.

Following a major scientific discovery, a third attempt is launched.

Will it finally succeed?