Reeling from Martha's decision, Humphrey must pull himself together to solve an inexplicable crime. A house was burgled and all forensic evidence points to one suspect. The only problem is that this suspect was locked up by Kelby in the station's police cell at the time of the break-in. With the arrival of the suspect's hard-nosed lawyer, the team are under pressure to get results. But with Humphrey distracted, it falls to Esther to take the lead on this investigation and crack the case.Meanwhile, Martha is equally distraught in the wake of recent events. Despite her mother's protestations, she remains firm, however painful it may be. With Humphrey at an all-time low, perhaps an unexpected journey can provide some hope?