It's summer and Lyme Regis is rammed with tourists. DC Tina Abbott is hoping her kids can have some fun on the beach with their granny Annie, who in turn is enjoying time with her swimming club. But then Annie and her friends’ morning swim is disturbed when they spot the body of local artist Clifford Muldoon, floating near the Cobb. Tina has things under control. But Annie, emboldened by her involvement in Lyme Regis’s last murder case, wants to get involved. And could the swimmers have information that might help solve the crime?

It's summer and Lyme Regis is rammed with tourists. DC Tina Abbott is hoping her kids can have some fun on the beach with their granny Annie, who in turn is enjoying time with her swimming club. But then Annie and her friends’ morning swim is disturbed when they spot the body of local artist Clifford Muldoon, floating near the Cobb. Tina has things under control. But Annie, emboldened by her involvement in Lyme Regis’s last murder case, wants to get involved. And could the swimmers have information that might help solve the crime?