Dorumaa's Children

From Introduction:

Two years ago, the last of the Leviathans of Dorumaa gave birth to a pair of calves. These two giant children have played in the moon’s ocean, attracting a great deal of attention. Some of it, from a man named Rufus Trammel, they could have done without. Now, one of the calves has disappeared. Can the heroes of Cularin find it before it’s too late? An adventure for heroes levels 1-9. This scenario is a standalone episode.