Dinah Galloway - budding diva, enthusiastic gourmand and amateur detective - is back. This time she has taken to the high seas with a gig in the lounge of an Alaska-bound cruise ship. Also aboard are her mother and her older sister Madge, a moody professor of First Nations art, an elderly woman with romantic intentions toward an even older man, an aspiring thief with gooseberry-colored eyes, and a priceless Native mask that seems to be attracting far too much attention. The mask is on its way to a museum to be returned to its ancestral home, but is stolen moments before its delivery. When Dinah is pushed into a glacial lake, the mystery becomes more dangerous and the pool of suspects deepens.