Holidays on the Adriatic? For Commissioner Isabelle Martin, it remains wishful thinking. Because as soon as she arrives in Bibione, the young runner Alina collapses dead before her eyes - a super talent with great ambitions. And that just a few days before the big Adria Beach Run. The autopsy detects doping substances in the blood: tragic accident or murder? Between beach vendors, smugglers and a hot holiday romance, Isabelle investigates undercover, supported by her jealous but always smart favorite colleague Sigi Schwaiger - and gets into danger herself.