Will tries to honor his brother with a toast at Sam's wedding, where Sam marries an identical twin. Will remembers being mistaken for his twin brother by a grieving mother.

Two years after Bill's death, Will and Bob embark on an 1,100-mile bike tour from Massachusetts to Wisconsin.

Will and Bob arrive safely in Wisconsin. Sam writes a song about a strained relationship between two brothers, and Sam shares his bike journal with Will.

Hannah and Paul recount a terrifying ordeal from the second day of their bike trip with Sam and Bill.

Sam, Bill, Hannah, and Paul give a motivational speech to a group of students on their way across the Navajo Reservation. Sam, Paul, and Hannah also recount some of their more memorable hosts from the trip, and Bill has a terrifying encounter with a stranger at midnight.

Sam writes a song about Thomas Mann's The Magic Mountain, the book that Bill was reading on the trip.

Will revisits Sam's journal entry about the day Bill died. Sam, Hannah, and Paul remember their friend.