Film about the seventh voyage to the Atlantic of the floating base of the Hydrophysical Institute of the USSR Academy of Sciences "Mikhail Lomonosov". Map of the Mikhail Lomonosov route. Ship in the Atlantic Ocean. Storm. The crew of the ship, members of the expedition at work, including German scientists. Research work. An American plane is flying over the ship. Canada. Port of Halifax city. "Mikhail Lomonosov" in the port (winter shooting). The streets of the town. Snowstorm. The movement of road transport, buses, trolleybuses. Snowfall. Trolleybuses in the parking lot. The snowplow is working. Pedestrians on the streets. Meeting of the Mikhail Lomonosov team with Canadian scientists. Landscapes of the Atlantic Ocean. The movement of fishing, research vessels "Ob", "Zarya", "Vityaz", the submarine "Severyanka".