Can love be measured in percentages? After her girlfriend leaves her for a man, brokenhearted novelist Charlie Cross moves from New York to Los Angeles to work on a TV show based on her books. Charlie vows to never date any woman who isn't a hundred percent certain of being a lesbian. But when she is seduced by gorgeous bisexual cooking show host Ava Castaneda, whom she's had a celebrity crush on for ages, Charlie is forced to review her belief in percentages because true love could very well be on the line.