Kevin is a young man without a soul, holidaying in Tokyo; Mr Five, the enigmatic kappa, is the man he so happens to meet. Little does Kevin know that kappas—the river demons of Japanese folklore—desire nothing more than the souls of other humans.
Set between Singapore and Japan, Kappa Quartet is split into eight discrete sections, tracing the rippling effects of this chance encounter across a host of other characters, connected and bound to one another in ways both strange and serendipitous. Together they ask one another: what does it mean to be in possession of something nobody has seen before?