Seraphima Nickolaevna Bogomolova - Puzzled

A rendezvous in a Notting Hill café, a mystery of the digits 6-6-6, a snapshot taken at the Christmas reception, a stranger, looking strangely familiar, and a coincidental encounter on a snowy yacht — what is it — a number of unconnected coincidences or meaningful signs in the lives of the two seemingly different yet so similar young people?