Unorthodox Dr Daniel Nash admits paranoid schizophrenic and ex-drug abuser Billy McLeod to Muirpark Psychiatric hospital. Dr Kate Millar believes Billy should be medicated and Nash's superior Dr Harvey thinks Billy is using the hospital as a free hotel. Nash,however,thinks that Billy is genuinely frightened of people who are literally coming to get him and,after Billy is discharged,Nash is proved right as he and Kate have to save Billy. New doctor Martine Nichol is perplexed that the incredibly articulate Barry Dixon should be under a section,until she observes his behaviour at the ward round and Dr Shug Nevin,whose girlfriend has just left him,is as depressed as the patients. It is Nash though who is seeing a doctor who prescribes him lithium.