Amyloidosis is a group of disorders characterised by the accumulation of insoluble proteins in tissues. These deposits lead to organ dysfunction and, in many cases, death. This paper discusses the case of a 61-year-old male patient who presented with fatigue, dyspnoea with minimal exertion and noncharacteristic abdominal cramping pain that had been present for three months. Laboratory tests showed abnormalities indicating cholestasis, liver and kidney damage, and hypercalcemia. Echocardiography revealed thickening of the left ventricular walls with preserved ejection function, a strongly hyperechoic interventricular septum. Despite intensive pharmacotherapy, the patient developed multiorgan failure and died due to the signs of hepatic encephalopathy and acute kidney injury. According to the autopsy report storage disease is suspected, and additional examinations revealed intercellular amyloid deposits (Congo Red +, Sinus Red +) in the heart muscle, spleen, and liver.