Sydney has to undergo a lie detector test, from Sloane, who is looking for the SD-6 mole. Meanwhile, Sydney goes searching for the connection between a 500 year old Rambaldi sketch and a machine, with Anna Espinosa on her tail. Also, Will is still looking for the mystery behind Kate Jones, Danny's so called mistress. And Sydney discovers a keepsake owned by her mother, which deepens her into her father's past.