The heroine of the series "The Big C" is Katie, an ordinary American housewife, a devoted wife and caring mother. But her whole life is turned upside down in an instant when she learns that she has an inoperable cancerous tumor in her body. Katie decides to live her last days the way she has always dreamed of. She kicks her boring husband Paul out of the house, quits her tedious job, and starts building a swimming pool to personally teach her son Adam how to dive. And why didn't she do all this before?