 Laura and Almanzo welcome their second child, a baby boy. They are undecided as far as names go, and Doc Baker examines the child to make sure he s in the best of health. But one fateful morning, the Wilders awaken to find their new baby deceased. Right away, a dumbfounded Laura places blame squarely on Doc Baker, whose business starts to wane and he considers leaving Walnut Grove. But, when Rose suddenly comes down with small pox, the good doctor is their only hope.