At Qingyuan Third Middle School, Lin Nian awakens an A-grade Summoner class, yet faces mockery from the entire school due to the profession's exorbitant costs and his status as a sinner's son. Faced with Zhao Hao publicly humiliating his mother, he pushes past his limits and fiercely strikes back. Just as the five thousand gold coins in medical fees and leveling pressure close in on him, his eighteen-year awakening progress finally reaches 100%, and the hidden system officially activates—the Summoner transforms into the "Shadow Monarch", and brand new power is about to awaken.