Plot Summary (Dante's Peak) Dante's Peak

A volcano in Colombia kills Harry's fiancee and teaches him that mountains don't bluff

In 1993, USGS volcanologist Harry Dalton (Pierce Brosnan) and his fiancee Marianne are fleeing an eruption in Colombia when a lava bomb crashes through their truck roof and kills her. Harry escapes but carries the lesson: staying too long for the readings costs lives.

Four years later, Harry is sent to a small town sitting on a dormant stratovolcano

In 1997, Harry's boss Paul Dreyfus (Charles Hallahan) pulls him off vacation to investigate seismic activity near Dante's Peak, a small Cascades town in Washington state. Harry arrives on the day Mayor Rachel Wando (Linda Hamilton) accepts a Money Magazine "second-best place to live" award. The town is courting an $18 million investment from Elliot Blair that would create 800 jobs. Everything the town has built depends on stability.

Harry finds dead hikers and recommends an alert, but the institutions overrule him

Harry drives up the mountain with Rachel and her children, meeting Rachel's stubborn ex-mother-in-law Ruth (Elizabeth Hoffman) at her cabin near Mirror Lake. He finds dead trees, high pH readings, and two hikers boiled alive in a hot spring. He recommends alerting the town at a city council meeting, but council member Les Worrell warns that Blair will pull his investment. Paul arrives from Washington and overrules Harry in front of the council, citing the Mammoth Mountain false alarm of 1980, which nearly bankrupted a community. Paul promises that any future action will be based on scientific evidence, not opinion.

Harry stays to monitor the volcano and falls for Rachel while the instruments show nothing

Harry refuses to leave but accepts Paul's terms. He joins the USGS team deploying seismometers and monitoring equipment. He has dinner with Rachel and her children, does magic tricks for the kids, and tells Rachel about Marianne. The team sends a robot called Spider Legs into the crater and team member Terry breaks his leg in a rockfall. Harry insists the tremors were magmatic, but the instruments show nothing unusual and the team sides with Paul. On their last night, Harry and Rachel come close to sleeping together -- until Rachel's daughter Lauren turns on the kitchen faucet and the water reeks of sulfur.

The sulfur water vindicates Harry and the evacuation begins -- too late

Harry tests the water supply and finds sulfur dioxide levels matching what he saw on Mount Pinatubo before it killed hundreds. The seismographs begin swarming. Paul finally authorizes putting the town on alert. Rachel broadcasts an evacuation call and a town meeting is scheduled at the high school. But Ruth refuses to come down from the mountain, and the children overhear the adults arguing about it. Graham and Lauren steal the family truck and drive up the mountain alone.

The volcano erupts during the town meeting and Harry drives into the disaster

The gymnasium floor shudders mid-meeting. The crowd panics. Harry and Rachel fight through the stampede to find the truck gone -- the children have driven to Ruth's cabin. Paul radios his apology: "For whatever it's worth, you were right and I was wrong." Harry drives through ash, flooded roads, and past a crashed helicopter, racing up the mountain after the children.

Trapped at the lodge, the group flees across an acid lake and Ruth sacrifices herself

Harry and Rachel reach Ruth's lodge to find the children safe but the road destroyed behind them. They flee across Mirror Lake by motorboat, but volcanic activity has turned the water to acid. The propeller dissolves. The hull corrodes. Ruth steps into the acid water to push the sinking boat to shore, sustaining chemical burns that kill her. On the road down the mountain, Ruth apologizes to Rachel and dies with her last words: "I get to stay on my mountain."

Paul drowns, the town burns, and Harry leads the family into a mine

Paul radios a final goodbye and drowns when the bridge collapses. Harry drives through lava that sets the truck on fire. Les watches the town he fought to protect burn to nothing. A pyroclastic cloud descends and Harry drives for the abandoned mine that Graham used to explore -- the same mine Rachel forbade him from entering. They shelter underground as the volcano consumes everything behind them.

A NASA transmitter and a blinking light bring the rescue

Harry promises the children a deep-sea fishing trip to Florida, then crawls back through the ash to retrieve an ELF transmitter from the buried USGS truck. Days later, team member Nancy notices the blinking signal at the monitoring station. The rescue crew digs Harry out, then reaches Rachel and the children in the mine. Graham's question -- "Did you really mean what you said about taking us fishing?" -- confirms that Harry has committed to the family, not just the rescue. Harry lost Marianne because they stayed for the readings; here he saves Rachel's family because he stayed for the people.