Phyllis would like to think she's entering the Christmas cookie contest just for fun. But that's not exactly true. She can't imagine anyone beating her delicate snowflake-shaped lime sugar cookies, although her neighbor Mrs. Simmons's gingerdoodles might give her a run for her money.

Then, during her annual Christmas cookie exchange, Phyllis heads over to the elderly Mrs. Simmons's home and finds the poor thing in a pile of lime sugar cookies, strangled by the belt of her own bathrobe. With a number of names on Santa's naughty suspect list, this case is a cookie Phyllis means to crumble...