A Colt Is My Passport

Senzaki, a ruthless yakuza boss, hires Kamimura to eliminate his former ally Boss Shimazu because Shimazu has been embezzling money from an international co-op they share. The betrayal of their business arrangement makes Shimazu a liability that Senzaki wants removed.

They escape by using a cleverly concealed second brake that Shun had installed behind the driver's seat earlier. The hidden brake causes the vehicle to stop abruptly, killing Shimazu's men and giving them time to flee into the night.

Shun's earlier preparation of the hidden brake becomes crucial during their captivity.

During their stay at Hotel Nagisakan, Mina forms a wary human connection with the two fugitives. Despite the dangerous world they inhabit, she offers them kindness and eventually helps orchestrate their escape by directing Kamimura to a freighter captain willing to smuggle them out.

Mina's role as an overworked waitress at a roadside truck stop provides the brief human moments that contrast with the surrounding violence.

Even after Tsugawa negotiates a fragile peace between Senzaki and Shimazu's newly ascended son, both sides agree that Kamimura must be eliminated. As the contract killer who actually carried out Shimazu's assassination, he becomes a liability to the new peace agreement and a target for both clans.

When Shun is kidnapped and Senzaki calls to arrange a rendezvous, Kamimura negotiates a three-hour window to release Shun in exchange for himself. Despite knowing he'll likely be killed, he chooses to sacrifice himself to save his partner, demonstrating the only loyalty that matters to him.

Kamimura spends the day before his execution devising a counterstrike. He spies on the attackers testing a bulletproof car meant to witness his death, then crafts a bomb and digs a hidden ditch along the car's route. When the vehicle rolls over him, he places the explosive underneath, destroying the car and everyone inside.

The bulletproof car the attackers test becomes the very weapon used against them.

The car bomb kills all four key antagonists: Senzaki, the yakuza boss who ordered the hit; Shimazu's son, who succeeded his father as boss; Tsugawa, who brokered the peace deal; and Miyoshi, Shimazu's devoted enforcer. They all die in the single devastating explosion Kamimura triggers.

Despite being struck multiple times during the ambush, Kamimura survives the final confrontation by hiding in the ditch. After the car explodes and kills his pursuers, he emerges injured and exhausted, limping away alone into the distance. The film ends on his battered, unresolved exit from the violent world he inhabits.

After the ferry is forced to depart early by Miyoshi, Shimazu's enforcer, Kamimura and Shun arrive at the port in their truck and run down the hitman. However, the ferry has already sailed, cutting off their chance at a quick exit and forcing them to return to Hotel Nagisakan to devise another plan.

Miyoshi's interception at the ferry represents another instance where the protagonists are always one step behind their pursuers.

While at Nagisakan, Kamimura drugs Shun with a sleeping pill to keep him unconscious and out of danger while Mina helps secure their escape route through a freighter captain willing to smuggle them out of the country. The drug ensures Shun stays safely hidden during the dangerous negotiation.