Traveling through southern Florida, a New Yorker Don Counsel is being framed by Ernest Riever for a murder he did not commit. Riever is holding the real killer captive on his yacht while detectives are searching for Counsel. Meanwhile a young Pen Broome tries to help Counsel out. Riever's men find Counsel and trap him in a ballast bulkhead, but Pen rescues him. Will Counsel be able to prove his innocence?