In the closing stages of WWII, a group of top british and Australian commandos were selected for the biggest covert operation of the Pacific War. Operation Rimau (Malay for Tiger) was an ambitious plan to penetrate Singapore Harbour in top-secret one-man submarines called Sleeping Beauties and launch an attack on 60 Japanese ships at anchor. As the commandos infiltrated japanese-occupied waters near Singapore, things went horribly wrong. Due to bureaucratic fumbling and incompetence, the submarine detailed to pick up the men did not arrive. They were all executed by the Japanese.