A Simple Favor is about a mommy vlogger named Stephanie Smothers (Anna Kendrick from The Last Five Years and Into the Woods) who meets an eccentric and enigmatic woman named Emily Nelson (Blake Lively from The Shallows and All I See is You). The women’s sons are best pals, so after a couple of martinis, Stephanie and Emily become fast friends, with Stephanie vicariously relishing in the glamorous life of Emily and her author husband, Sean Townsend (Henry Golding from Crazy Rich Asians).