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Several people died of cardiac arrest almost simultaneously on a Saturday morning in Zurich and the surrounding area. The cause was electric shock from implanted defibrillators (ICDs), whose manufacturer had fallen victim to a cyberattack . Hackers are demanding a ransom in the hundreds of millions of euros for a digital key that will get the company's computers working again! Detectives Isabelle Grandjean and Tessa Ott are under extreme pressure as reports of further deaths keep coming in.