Lois and Clark check into the honeymoon suite. No, it's not what you think. They're undercover, on the trail of a crooked Congressman and international arms dealer who threaten national security.
Lois decides to take a weekend off from work and books the honeymoon suit on a luxurious hotel to relax. While being there, she witnesses Congressman Ian Harrington possibly making a dirty deal across the street about a top secret government project named "Shock Wave" with arms dealer Thaddeus Roarke.
She takes some photos of the men exchanging money and when she returns to the Daily Planet, she asks Perry to let her go back to investigate the subject. Perry agrees but decides to send both, Lois and Clark, undercover as a newly wed couple to stay at the suit and spy on the two men.
Lois and Clark experience how it is like to live with someone else while at the same time they discover that Roarke plans to sabotage a weapon test of the navy causing the lives of millions of people. Superman manages to stop the disaster and saves Metropolis. Roarke is arrested and Congressman Harrington set up a sting operation to put him behind bars.