Former college friends Bob, Tom and Susan meet for a weekend reunion, all three having recently ended long relationships. When Bob and Susan sleep together, Tom's anger betrays his longtime love for Susan, and the reunion begins to disintegrate. Although Bob and Tom get into a fight, the three friends eventually reconcile. Meanwhile, Peter is jealous of Christine's affair with Adam Kirkwood, a wealthy, young, international businessman. Returning after a long mourning period for his late wife, the hotel's venerable chief of security, Art Patterson, believes that his assistant, Billy, is after his job. Patterson plants a bomb in the hotel basement. When George Sandler, a rich man with political aspirations, hosts a fund-raiser, Adam invites Christine and Peter. Trailing them is Mr. Rider, an FBI agent interested in Adam's illegal weapons shipments.

Learning that Christine's boyfriend, Adam Kirkwood, is the FBI's prime suspect in an arms smuggling operation, Peter takes Christine to Agent Rider, who informs her that George Sandler, a powerful politician, and Adam are plotting to sell arms to guerrilla forces in the Third World. After planting a bomb in the hotel basement, security chief Art Patterson anonymously tips off the hotel and personally disarms the bomb in order to make himself a hero. When Billy finds evidence pointing to Patterson, Patterson asks for Billy's resignation. Over Peter's objections, Christine agrees to plant an FBI listening device in Adam's bedroom. When Adam catches Christine, Sandler insists on killing her, but Adam arranges for Peter to take Christine to safety. At the hotel, Billy agrees to resign, but Patterson eventually confesses to Billy and leaves the hotel security in Billy's hands.