The PLANKTONAUTS live in a world that in theory, may exist. A theory that we are part of God, and everything we dream must exist, for existence is infinite and thus includes everything in every manifestation, both possible and supposedly impossible.

Also, that size is infinitely infinitesimal. Existence exists in both infinitely large and infinitely small directions.

We are living in a universe that exists at a sub-molecular level of a universe far larger than we can comprehend. So much larger than us that we are existing in its sub-atomic substance.

Transversely, there exists an imperceptible universe within the materials that comprises the universe in which we exist.

This chain of universes goes on infinitely.

When these 'plains of existence' are multiplied by the size of the material existence which we can, (sort of) comprehend, it does seem quite a large conception! This is where the Planktonauts exist, one level down from where we are.