On a mission to help a world that's destroying itself due to pollution, the Enterprise rescues a tourist ship that's suffered an explosion. The captain aboard the ship is a friend of Worf's parents. He can't understand why the explosion occurred, though it might be due to the Sli, one of whom was killed in the disaster. This mysterious alien race, which the universal translator cannot be used upon, manipulates (intentionally?) the emotions of the crew, causing chaos on the ship. Adding to the ship's troubles is the Sli's agent, a Ferengi.
This was a story that spent a lot--a lot--of time with emotions running loose with the crew. Naturally Data is spared, as is Guinan, but there are plenty of outbursts, especially from Geordi and Worf. Troi plays a major role in trying to temper these flares, but she is having issues as well. I wasn't thrilled with these emotional diatribes. This made the book come off as a budget saving episode as over 90% of the book is set on the Enterprise. The initial danger of the planet in ecological danger is pushed aside in favor of the emotions run rampant storyline and addressed as an afterthought in the final two chapters.
There are some interesting possibilities with Worf realizing something about Alexander and a crew member from the episode "The Drumhead" getting some major exposure, but there just wasn't enough to keep me happy. And if you'll blink you'll miss Ro.
This is just not a Trek novel I'll remember in a few weeks.