U.S. Marshals want White Collar's help in rounding up an FBI agent gone rogue. Peter wants this former colleague alive, using Neal's expertise at evading capture.
Who slew the quantum microprocessor developer? Peter and Neal go undercover as an auditor and a marketer, respectively, to find out, leaving Mozzie and Diana to uneasily co-investigate Kate's death.
When Peter is suspended by the FBI for a crime he didn't commit, he is forced to run a sting with Neal and the gang to catch Mozzie's shooter and clear his name.
To save a U.N. ambassador's wrongly arrested son, the FBI accepts Mozzie's help in fabricating a blood ruby, then Peter aids Neal in slyly retrieving a stolen hard drive.