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Joe is an out-of-work drifter who is dependant on his fashion-model girlfriend to survive. When the model sleeps with the son of a wealthy tycoon to get Joe a coveted employment position, he drops her like a hot cup of saki. Later, Joe goes to a nightclub where he is seduced by a married woman who talks him into helping her murder her husband. The only witness to the crime is a homeless man, who Joe keeps close to his side and under the gun. Joe and the beggar built a raft in hopes of floating off to Brazil. He calls on his old girlfriend who pledges her love and agrees to meet him at the dock. When she arrives with the police, Joe shoots her out of anger. He and his wounded girlfriend embark on the makeshift raft and, against overwhelming odds, hope to get out of the harbor alive.