No one is coming to your aid. We have ensured this. Six strangers wake up on a remote island in the Florida Keys with no memory of their arrival. They soon discover their common bond: all of them are heroin addicts. As the first excruciating pangs of withdrawal make themselves felt, the six notice a yacht anchored across open water. On it lurk four shadowy figures, protected by the hungry sharks that patrol the waves. So begins a dangerous...