Immersed in the body of a professional diver on an expedition, viewers sink into the deep ocean. Faced with the cosmic beauty of the abyss, their experience takes an unexpected turn when the fate of the protagonist is at stake.
Guided by the voice of her mentor Eva, Rachel dives alone to the bottom of the ocean for a scientific expedition. While strange phosphorescent parasites attack the fauna and flora, she is in turn infected and gradually discovers the real reason for this exploration. A cinematographic work with a science-fiction feel, Biolum immerses us into the beauty of the deep waters, which fill us with wonder with all the mystery they contain.