It’s 1958 and Jack Paar is hosting The Tonight Show. He’s booked his favorite guest, a pundit as hilarious as he is unpredictable: Oscar Levant, who once famously proclaimed, “There’s a fine line between genius and insanity, and I have erased that line.” In 90 short minutes, Oscar will have audiences howling, censors scrambling, and - when it’s all over - America will be just a little less innocent than she was before.