After getting drunk and disorderly at her ex-boyfriend's wedding, Dr. Mindy Lahiri realizes she needs to get her personal and professional life back on track.

When Josh invites Mindy to a Halloween party, Mindy stresses out about finding the perfect costume to impress him. Meanwhile, Danny and Jeremy leave work early to finally take their driver's license tests, much to Danny's embarrassment.

Mindy acts as a mentor to a college student. But when Casey and Mindy unexpectedly hit a rough patch, she decides to drown her sorrows at a frat party where she reunites with her old flame, Tom, and all hell breaks loose. Meanwhile, Danny and Jeremy try to woo Morgan away from the midwives.

As Mindy adjusts to her long-distance relationship with Casey, she also must adjust to the fact that she is no longer the office's "Dr. L" - her office, patients and dignity have been overtaken by Dr. Paul Leotard - so she challenges Paul to get her former life back. Meanwhile, Danny has a new extracurricular activity following his breakup with Christina.

Mindy discovers an incriminating video of herself that is floating around the internet, and she enlists the help of Peter to keep it from falling into the wrong hands.