As we meet Emma, a spirited professional dancer played by the exceptionally spirited Annie Murphy, she’s about to turn her life upside down. And who can blame her? She’s in her 30s and her latest gig, a commercial for panty liners, has her slithering around in a Santa’s helper getup. At home that night, she suffers the latest indignities from her controlling longtime boyfriend — a brief, sharp turn from Finn Wittrock, dispensing put-downs while sculpting his jawline with gua sha. Presto change-o, Emma is single again, for the first time in 10 years, and determined to start a new career — huge upheavals, but in the exuberant froth of All…