Dr. William MacLure (Edmund Gwenn) a Scottish doctor, adopts Lassie, who has an unnatural aversion to water.

After operating in his own house to save the young man's life, the elderly doctor in payment has extracted a promise from his father, a friend who was the previous owner of Lassie, that he will allow him to send the young man on a four-year medical course in Edinburgh so he can take over from him one day as doctor in the Glen.

The young man when recovered is sent away and the increasingly old doctor continues administering to his patients in the area, who begin to fear for his health.

After almost being pulled under by a whirlpool twice, Lassie makes the other side on her second attempt and seeing this, the two men wade across the waist deep flooded river.

[4] Track listing for Hills of Home (Disc 3) Contains Sound Effects The film earned $1,407,000 in the US and Canada and $905,000 overseas, resulting in a loss to MGM of $689,000.