When twins Cass and Jo leave the bright lights of Paris and London to meet their godmother's solicitor in a small, sleepy Welsh seaside town, they don't expect their lives will change at all. Instead, they find themselves embroiled in the weird and wonderful carryings-on in the fictional Welsh town of Porthcwm amidst its larger-than-life inhabitants. There's greedy and lascivious local estate agent Arthur Trinder; Gloria, the scantily clad, plastic surgery-addicted cleaner and wicked, tourist-scam inventor Bert Lloyd. Then there's the handsome, grouchy doctor, and excitable Rosa, with her miracle cowpat. Was the arrival of the twins the catalyst for the drunken sandcastle competitions, and farmyard police raids? And is the older generation, both alive and dead, giving fate and romance a helping hand?