Yunji, a young man who struggles with his life after being orphaned at the age of ten. They left him a debt that swallow his entire assets leaving him with nothing but a paid college tuition. Fi, a young girl cruelly orphaned by war and had her grandparents stolen by time. She struggles to survive with meager amounts left for her and the hope of acquiring a companion beast. At the Day of Calling, two worlds, two orphans answered each others Call.