Ian's promiscuity and recklessness drives Mickey to the brink, and he demands Ian enter a mental rehabilitation facility. Homeless and penniless once again, Frank takes advantage of his liver donor's parents. Sammi's trailer is impounded. Debbie sets out on the path of revenge. Carl continues to flounder at his newfound business. Lip is caught in defining quandaries. Fiona is rocked when a colleague overdoses on heroin; combined with her increasing worry that her recent decision to marry might have been a hasty one. Things are complicated even further for Fiona when she finds Jimmy sitting at one of her tables. Ian flees, with Mickey's baby in tow.