Mira manages at the last second to get back to her own time - but has she succeeded in her mission? And how did it go for all the new friends from 1920?
Vilgot understands that Ernst's strange behavior has to do with the mansion. And Ernst finds the lucky piece, but when he tries to tell it, August and Märta make a terrible decision.
While Ernst does everything not to be killed in 1920, Vilgot comes with bad news about the black hole. Mira manages to figure out why Anna-Carin does not exist, but how should she arrange everything?
Will Mira have time to stop the train, so that Ivar and Greta meet again? And will she make it back before the hole is destroyed? In 2020, Rakel is waiting. She sees how the black hole becomes more and more unstable.
Ernst begins to demolish the mansion. Anna-Carin and Vilgot discover that the black hole remains. Mira must warn Sören and will only exchange with Rakel for a quickie, she thinks.
Ernst in Lady's body is desperate - how to make Rakel understand, to avoid being killed. And in 2020, Vilgot manages to find a way to save the solar system, but that complicates Mira.
Mira gets to go to the Christmas market in 1920 and Sören tells how to stop a train. Rakel leaves again to buy the equipment and this time she intends to succeed.
Mira gives the perfect Christmas present to Sören. And in 2020, Vilgot will begin the countdown before destroying the black hole. If Mira does not stop the train and make it back in time, she and Rakel will be stuck forever - at the wrong time.
Anna-Carin and Vilgot think they have lost everything. Mira and Rakel set out on a journey of discovery and notice that there are both advantages and disadvantages to the different times.