Arcus, a member of the S-rank adventurer party 'Brutal Edge', possesses the skill <Slime>, which allows him to shapeshift into a slime and create clones. Initially considered a useless skill, his ability to create clones is his only asset. Betrayed and expelled by his party leader, Dan, for his perceived weakness, Arcus vows revenge and to become stronger. While hunting monsters, he discovers that his skill grants him experience points multiplied by the number of clones he creates. Realizing this cheat-like ability, Arcus rapidly levels up, surpassing his former party and achieving unparalleled strength. This is a refreshing story of a protagonist's rapid growth and revenge.