Lucy is a people-pleasing writer-photographer who exists in a timid state of inertia while her dreams of being an artist remain just out of reach. A comment from her boyfriend about her yellowing teeth triggers Lucy to make an appointment for a dental checkup for the first time in years. During her teeth cleaning with the mysterious yet heavily advertised Big Smiles Dentistry, Lucy's uncertain boundaries for polite, socially-acceptable behavior repeatedly put her perpetual avoidance to the test.
