The miniseries commences in a gripping moment on September 8, 1972, as Team Canada steps onto the ice for Game 4 in Vancouver. They are unexpectedly met with the boos of their home crowd, overshadowed by the cheers for the Soviet team. The story then rewinds five months back to April 1972, where Alan Eagleson meets with Gabrielle Fournier, an official from External Affairs Canada, along with the directors of the Soviet and Canadian national ice hockey programs, headed by Alexander Gresko, Joe Kryczka, and Charles Hay in Prague, Czechoslovakia. They finalize arrangements for an exciting eight-game series between the USSR and a team formed by the top NHL players from Canada.
Eagleson ventures to Rochester to recruit former Boston Bruins coach Harry Sinden, convincing him to take the helm. However, Sinden’s initial interview with the Hockey Canada executives is met with skepticism due to Kryczka's doubts about his ability and disagreements about assistant coaches, particularly regarding John Ferguson. Despite the challenges, Eagleson persuades the brass to appoint Sinden, claiming he is the coach desired by the players. In July, Sinden announces the roster for "Team Canada" in a press conference in Toronto, presenting notable hockey stars such as Phil Esposito, Paul Henderson, Ken Dryden, Vic Hadfield, Rod Gilbert, Bobby Clarke, Gary Bergman, Frank Mahovlich, and Peter Mahovlich.
As August rolls in, Team Canada's training camp kicks off, but many players arrive out of shape and fail to take it seriously. In the lead-up to the series, a pervasive expectation surfaces among Canadians: an easy eight-game sweep. However, right before Game 1, Sinden confides to Eagleson his doubts about the team's preparedness. Reports suggest to Sinden and Ferguson that the Soviets are a sluggish and poorly skilled team—bar one standout player, Valeri Kharlamov, and claim their goalie, Vladislav Tretiak, is easy to score against. This creates a sense of misplaced confidence among the Canadian players, leading to laughter during a Soviet practice until Kharlamov retaliates by shooting a puck into the stands, igniting animosity between the teams.
Game 1 in Montreal starts as predicted with Esposito scoring a goal within the first 30 seconds, soon followed by Henderson, putting Canada up 2-0. Yet, the Soviets bounce back quickly to level the match 2-2 before the first period concludes. The rising heat in the Montreal Forum starts to take its toll on the Canadian team, with Kharlamov netting two goals in the second period, giving the Soviets a commanding 4-2 lead. Ultimately, the Canadians fall to the Soviets with a score of 7-3. This unexpected defeat leaves Team Canada and the nation in shock, inciting heavy criticism.
As they prepare for Game 2 in Toronto, Sinden opts to replace the "GAG" line with tougher players like Wayne Cashman, J.P. Parise, and Bill Goldsworthy. Vic Hadfield expresses his disapproval of the decision forcefully, challenging Sinden directly in the dressing room. Additionally, Tony Esposito replaces Dryden in goal. Tensions rise and tempers flare as players like Frank Mahovlich become frustrated by political figures mingling with the team instead of focusing on the game. Despite initial fears, Team Canada triumphs over the Soviets in Game 2, winning 4-1 to level the series.
As events unfold in Winnipeg, Gresko and Soviet coach Vsevolod Bobrov demand referee changes after feeling aggrieved by officiating in Game 2, leading to further bickering. Meanwhile, motivations weigh heavily on the players. Though Hadfield remains sidelined in Game 3, the Canadian team leads 3-1 at one point, only to finish in a 4-4 tie.
Emotions run high as Game 4 approaches in Vancouver. Facing jeers from their local fans, Team Canada fails to find their footing against the well-prepared Soviets, losing 5-3 and falling behind in the series. Observing the crowd’s response leaves Esposito emotionally distressed, stating their passion for representing Canada, despite the backlash.
Part 2 transitions with Eagleson discussing the fan discontent in an interview and preparing the team for critical international games. An intense matchup against Sweden results in an aggressive showing, highlighting the growing frustrations of Sinden and Ferguson regarding officiating.
Subsequent Games 5 and 6 bring rising tensions and shocking moments, including a confrontation with Soviet authorities over a Canadian fan's arrest. Canada loses the tightly contested Game 5 despite leading 4-1, with the Soviets showcasing their resilience, eventually turning the game around to win 5-4. As the Canadian players grapple with stress and uncertainty over their positions, the stakes ramp up heading into the decisive games in Moscow.
In Game 7, Canada has to contend with injuries, aggressive plays, and a slew of penalties, leading to a thrilling victory that keeps them alive in the series. Finally, the series concludes with Game 8, showcasing Canada’s determination to overcome the odds, leading to a breathtaking finish. Henderson scores the winning goal with only seconds remaining, sealing the series for Canada.
In the aftermath, the players celebrate their thrilling victory while reflecting on their journey. The series stands as a testament to hockey's unity and the unwavering spirit of a nation. The miniseries culminates with Team Canada absorbed in the profound significance of their experience, a moment captured poignantly amid the echoes of their victory and the tumultuous road that forged them into champions.