Leon faces a severe crisis after losing an S Rank beast that belongs to Riverside Academy, which demands 10 million dragon coins in compensation. The academy's representatives pressure him with threats of blacklisting and ruining his future in multiple academies if he fails to pay within three days. They also claim an additional 10 million coins compensation for themselves, pushing Leon deeper into debt. Despite the mounting pressure and bleak prospects, Leon resolves to power up his slime by obtaining a high-rank Soul Stone so it can transform into an SSS Rank beast, vowing to prove his worth and overturn his current misfortune.