As we return to Portwenn, all is not well with Doc Martin. With his career still under scrutiny due to his blood phobia, Dr Rebecca Hedden from the General Medical Council arrives to assess his bedside manner and determine if he is still fit to practise. Louisa, having resigned as head teacher at Portwenn School, is throwing herself into her new career as a child and adolescent counsellor, as well as spending more time with their son James Henry. When Louisa notices James is finding it hard to socialise at nursery, she starts wondering whether a little brother or sister would help. But with Martin having to jump through hoops to save his career and Louisa starting her new role the timing might not be the best. Meanwhile Al and Bert are making a success of running the Crab and Lobster, leaving Morwenna feeling a little neglected; Mrs Tishell has a new lease of life following Clive's death and decides to try dating again; and Penhale's authority is challenged when his predecessor returns. However, could an accidental proposal have wedding bells ringing in the village of Portwenn?