When Imogen and Anna unexpectedly inherit their grandmother Vivien's ice cream parlour, it turns both their lives upside down. The Brighton shop is a seafront institution, but though it's big on retro charm it's critically low on customers. If the sisters don't turn things around quickly, their grandmother's legacy will disappear forever.

With summer fast approaching, Imogen and Anna devise a plan. Rather than sell up, they will train up, and make the parlour the newest destination on the South Coast foodie map.

While Imogen watches the shop and conjures new marketing ideas, her sister flies to Italy to attend a gourmet ice cream-making course. But can their best-laid plans survive their warring family, tempestuous love lives - and the great British Weather? One thing is for certain - this summer will be like no other . . .