In the 1960s, children born during the international carnage of World War Two were becoming adults: falling in love; starting lives of purpose and promise; discovering family secrets; serving their countries, often involuntarily, and creating a variety of families. While in romantic Honolulu to sell the last family hotel to a group of employees, jaunty Luke meets dazzling Martha, who has been a registered nurse in New Zealand and is sailing from Auckland to her home in San Francisco, with only her dad for a crew. Tragedy strikes before Luke and Martha meet again, souring their reunion with exhaustion, tainting their relationship with deadly threats, issues of national security, and too much truth. Survive together, the FBI insists, or not at all.