Akihabara at noon. Milo Hartley, a lanky fan translator from Ohio, has come to Tokyo to meet the online friend he spent six years translating an old video game with, at sunset, 'where the Pilgrim's journey ends'. Then his phone dies, and in the crowd his backpack is swapped for an identical one with a stranger's notebook inside. A cheerful present-day adventure through the wonders and puzzles of Tokyo.