Bull and Chunk aim to prove that their client, a woman on trial for murder, committed the crime due to a lack of behavioral control caused by a brain tumor. Also, Taylor's professional and personal worlds come crashing down when she's suspected by the FBI for cybercrimes, and her ex-husband blindsides her regarding their son.

The TAC team gets a rare glimpse into Bull's personal life when his estranged brother of 13 years, Jacob Bull, unexpectedly arrives in New York. Also, TAC represents a financial investor accused by the FBI of running a Ponzi scheme with his father to defraud their clients of millions of dollars.