Seoul Station is home to Dokgo, a man with no memories of his past. Until one day his subdued existence is disrupted when he stumbles upon a lost wallet, triggering a chain of events that will change the course of his life.

Enter Mrs Yeom, a retired teacher turned convenience-store owner, who, upon discovering Dokgo's act of kindness in returning her wallet, offers him a meal as a token of her gratitude. Their chance encounter blossoms into an unexpected alliance when Dokgo's bravery saves the store from ruin, earning him not just a job, but a place in the heart of the neighbourhood.

But just when things are looking up for Dokgo, Mrs Yeom's troubled son, eager to sell the store, hires a detective to dig into this mysterious man's past and unearth what he seems to be trying so hard to forget...