Soil is not easy to follow. It is not a light read, or even a particularly pleasant one. But the rewards it offers to those willing to dig into the depths of this hellish wormhole are worth it.
The story itself exists on multiple levels, with different storylines told simultaneously:
Onoda and her down-to-earth investigation style - not every mystery needs an answer.
Yokoi and his descent into madness (the more abstract and chaotic portion of the story)
An underlying Jomon mysticism
A simple lost spirit of a murderer
Some crazy kids
On one level, we have the investigation of a small town and the disappearance of a family. As the investigation spirals out of control, Onoda makes it her mission to stay grounded and work through to the solution. Set against the background of supernatural events and mass hysteria, Onoda and her ragtag group make for a humorous and refreshing dose of practicality - i think an effort to help the reader from getting bogged down and lost in the larger background story. If while reading you find yourself getting lost, refer to the Onoda chapters, as they feature some of the most clear explanations of the plot you will find
On a more meta level, we have the insanity going down with Yokoi, who refuses to let any unknown go unknown and who stubbornly picks at the mysteries of the world until everything starts to unravel. It is through him we are introduced to the philosophy of Soil, to the larger context of chaos and unpredictability. Sometimes, things that are not supposed to happen, happen. Flukes - glitches in the matrix as we jokingly say. Most of us take note, chuckle to ourselves, move on with our day. Pick at the improbability of it long enough however...Suddenly the whole thing starts to unravel. The world as we know it is a lie built on top of chaos. We invent law and order, society, to prevent ourselves from going mad. Dig too deep, peel away the varnish, madness finds you. You have tread where you were not meant to go...and there is no turning back.
In other words, here is a simple, mildly spoiler synopsis of the concept of Soil:
Something happens which was not meant to happen. Unfortunately, it also occurs in a location known for these sort of happenings. Look too close and the hole opens: Many unhappening happens! The human mind is not equipped for such a breach of "reality" 🙁 Yokoi responds by breaking the world further, Onoda tries to fix it.
Yokoi is an asshole. Don't be like Yokoi. Well, unless you want to unlock the mysterious of the universe i suppose...