chicago's botanic garden held solely for the purpose of allowing michelle's father, who was dying of cancer, to walk her down the aisle. next, there was a lavish blessing ceremony in a 12th century villa on italy's coast. mark flew in a dozen gifts from the states. then mark topped it all off by renting chicago's field museum and inviting 110 guests for another formal reception there. those were the memories that kept running through michelle's mind as she and her mother waited for mark to return. but when the sun set that night and mark had not returned, as the captain had promised, michelle knew something was horribly wrong. but what? there were no reports of an accident involving mark, no signs of foul play, no ransom notes. only questions. was there a note of any kind? >> nothing. >> no message, nothing. >> i went through the boat like a crazy person just tearing everything up looking for something.