A story about Byron, a curious black cat, who helps a lonely and depressed writer express all the love she has inside her. She raises him like a son, they share life together and then they raise Tom, a younger and naughtier gray kitten. But, as he gets older, Byron falls ill and is given three months left to live. Sandra must come to terms with their mortality and decide whether to kill the one she loves most in order to save his suffering.