While Eli takes on a lead paint manufacturing case that may take him to the Supreme Court, Jordan is forced to defend his sanity in court. Meanwhile, Eli discovers his father's diary that contains a disturbing revelation.

Eli and Jordan take on a case to force the government to allow clinical trials of marijuana to cure MS. However, the billionaire philanthropist who backs them soon realizes that his own soon, suffering from MS, doesn't wish to participate. Meanwhile, Maggie and Matt try to determine who the mole is within the new firm that is luring clients to Posner/Kline.