When New York theatre impresario Tommy Burke asks Molly Murphy to help him take care of some family business back in Ireland, Molly is happy to oblige. Tempted by the prospect of going home for the first time in years (and putting her fledging detective agency on firm financial ground), Molly throws caution to the wind and climbs aboard the White Start Liner Majestic with hopes of sneaking on and off the isle without raising a peep. Until one passenger, who happens to be a famous Broadway actress goes missing-'and another turns up dead. So much for smooth sailing . . .