The Oilers signed Plante to a three-year contract following the season. He began his professional career in 2009–10 with Edmonton's top minor league affiliate, the Springfield Falcons of the American Hockey League (AHL). Several injuries on Edmonton's defence led the Oilers to recall Plante, and he made his NHL debut on February 1, 2010 against the Carolina Hurricanes and recorded an assist. He was returned to Springfield as injured players returned to the Oilers' lineup.