Despite her difficult life, 47-year-old Zoya is good-natured and compassionate. And when she discovers young Marina in the entrance of her house, who has lost her phone and money, she without a doubt lets the strange guest in and invites her to live with her, not even suspecting that she did not appear in her life by chance.
At the same time, investigator Andrei begins an investigation into the mysterious death of the astronomer Nikolsky and tries to understand: why did he hide the fact of his daughter's existence from everyone.
