A Homecoming bonfire gives everyone license to misbehave, and Jenna contemplates the ultimate decision: to DTR (define the relationship) with Matty or not DTR.
While Annie runs the extraction of a Chinese scientist named Shen Yue who is willing to defect, she runs into complications and is forced to make a difficult choice.
Spencer is determined to find out what Jason is hiding at his house and decides to finally get some answers. With Jason continuing to pop up in Aria's life, will she be able to resist their undeniable chemistry?
Neal and Mozzie must stay one step ahead of the the FBI while appearing to work with them in order to keep them from discovering that they possess the treasure.