Andy is surprised when ex-husband Les shows up unexpectedly after Lizzy has her knee operated on after a soccer accident. Les learns that his wife is dating Milo. Andy invites Milo to dinner to meet Les and is shocked by the tragedy that ensues. Andy meanwhile treats a prominent judge for hearing loss and has trouble figuring out the cause of it.

Lu tries to find out why a young patient has mysterious bruises on her body. Lu suspects the mother of child abuse while Dylan suspects the girl's nanny. Meanwhile, Dylan helps a patient try to combat her ####### addiction and when she has strange symptoms, he goes undercover to find out why. Kayla moves in with Lana when she has trouble finding an apartment.