I wish I wasn't a twin." Twelve-year-old Jolene is determined to find independence from her brother, Michael, during a family trip to research the Halifax explosion of 1917 for her father's Museum of Disasters. When her grandfather finds a time crease into the past, Jolene discovers a new friend and the importance of family and loyalty in a world torn apart by World War I. When Michael joins them, however, the past suddenly becomes much more complicated.