A young man, M, driven by the desire for a multimillion-dollar inheritance, puts aside his dreams of being an online games caster to care for his terminally ill grandmother. However, winning Grandma's favour is no easy feat. She proves to be a tough nut to crack - demanding, exacting, and exceedingly difficult to please. To add to the drama, he's not the only one gunning for the inheritance. Finding himself embroiled in competition with the rest of his family, he must go to great lengths to become the apple of Grandma's eye before time runs out...