docs(readme): add summary

Author: remarkablemark

README.md

@@ -8,7 +8,11 @@
 [![build](https://github.com/remarkablegames/knitbone/actions/workflows/build.yml/badge.svg)](https://github.com/remarkablegames/knitbone/actions/workflows/build.yml)
 [![lint](https://github.com/remarkablegames/knitbone/actions/workflows/lint.yml/badge.svg)](https://github.com/remarkablegames/knitbone/actions/workflows/lint.yml)
 
-🦴 KnitBone is a story-driven psychological horror visual novel, where the therapist is more traumatized than the patient.
+🦴 **KnitBone** is a story-driven psychological horror visual novel, where the therapist is more traumatized than the patient.
+
+> You play as Eden Cross, who suffers from chronic insomnia, feeling disconnected from your life. One day, an old college acquaintance – Ryohei shows up pitching a miracle cure for your insomnia: an “experimental therapy.”
+>
+> That sounds suspiciously more like what he also calls it ... a “guided ritual.”
 
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