A meeting in a London bus with jewel thief Lady Christina takes a turn for the worst for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits.
It tells the story of how Octavio and Adela were born on the same day: 14 April 1931, but in opposing families. Over the next 90 years their lives will intertwine, through intense encounters and misunderstandings, in eight episodes told in sequence shots.
When Danny, a guilt-ridden engineering geologist in transit to her remote Russian assignment survives a mysterious helicopter crash, she must try to escape the harsh environment. But she is not alone.