College assessor Miguev, returning home, finds a foundling at the porch. Having mistaken him for his son from the former maid Agnia, the frightened Miguev, in turn, is trying to toss the baby, but to no avail. Tired dad decides to confess to his wife Anna Filippovna, and, meanwhile, the true parents begin to search for their child left “for a second” at the threshold of a respectable house ..