[1] Operated by Metro Trains Melbourne, it is the city's only diesel service on the metropolitan network and the tenth longest line at 31 kilometres (19 mi).

[3] Trains on the Stony Point line run as two one-car formations of V/Line Sprinter DMUs.

[4] The line was built to connect Melbourne and Frankston with the rural towns of Baxter, Hastings, and Bittern, amongst others.

[5] The Stony Point line initially operated from Frankston to Baxter station, with services commencing in 1888.

[11][12] On another occasion in November 1995, an X class diesel locomotive in the V/Line Freight livery was used with three MTH carriages.

The units are selected from the normal V/Line fleet, and are not dedicated to operate the Stony Point service.

[18] In 2013, as part of Public Transport Victoria's Network Development Plan for metropolitan rail, an extension of the Frankston line to Baxter was earmarked to begin in the "long-term" (over the next 20 years).

[19] During the 2018 state election, the Liberal Party announced a project to extend electrified services to Baxter.

[24] The second Andrews government made no commitments to the Baxter rail extension, instead continuing construction on level crossing removal works along the Frankston line.

[24] The 2022 state election resulted in another Labor victory, with the Andrews government pushing ahead with these works.

[1][26] Train frequency is typically every 90 to 120 minutes throughout the day due to the line being single track with no passing loops.

[19] Unlike the rest of Melbourne's rail network, services do not run 24 hours a day on Friday nights and weekends.

[28] Train services on the Stony Point line are also subjected to maintenance and renewal works, usually on selected Fridays and Saturdays.

[36] The Stony Point line uses V/Line Sprinter diesel multiple unit (DMU) trains operating in a one or two-car configuration, with two doors per side on each carriage and accommodating up to 90 passengers in each car.

[41][42] The Stony Point line uses three position signalling which is widely used across the Melbourne train network.