Fight Back to School

Sing is on the verge of disqualification from the SDU due to his disregard for teammates. Wong Sir reassigns him to an undercover operation at Edinburgh College to recover the stolen revolver.

Sing is deployed undercover as a student at Edinburgh College to recover the stolen revolver. He is paired with Tat, an ageing detective listed as Sing's legal guardian in the files.

On his third day at the school, Sing is caught cheating on a Chinese history test, placing his place at the college at risk. The incident attracts heightened scrutiny and signals tougher times ahead.

The administrative staff pressure Tat to discipline Sing, leading to a brutal beating. The incident underscores the friction between Sing’s street-smartness and Tat’s strict methods.

Miss Ho, the school's guidance counselor, volunteers to tutor Sing personally. Her involvement introduces a compelling moral influence and foreshadows later tensions.

The school bully Johnny challenges Sing to a rooftop fight. Turtle Wong, who had earlier been protected by Sing, chooses to stand by him, signaling a shift in loyalties.

Sing defeats Johnny and earns the respect of his peers. His growing closeness to Miss Ho deepens the romantic tension and complicates his undercover role.

Miss Ho, already wary of police officers, discovers both Sing and Tat's real identities and begins to distance herself from them. The revelation strains the guide-student relationship that began earlier.

In a brutal confrontation, Detective Wong beats Sing, cementing the end of Miss Ho's relationship with him. The incident intensifies the emotional stakes for the undercover pair.

Two months pass with little progress, and Sing and Tat decide to pursue Teddy, the arms traffickers' boss. The decision marks a shift from classroom antics to real criminal pursuit.

Sing escapes from Teddy's crew with a truckload of weapons and returns Wong's stolen pistol. He then rushes back to rescue Tat, who is being held by the criminals.

The campus festival setup turns into a tense maze confrontation as Teddy's men corner Sing and friends. Miss Ho is held at gunpoint, forcing a high-stakes showdown.

Wong arrives to subdue Teddy with Sing's help, preventing the worst from happening to the students. Teddy is arrested, and the immediate danger is resolved.

With the mission essentially complete, Wong promotes Sing to Chief Inspector in recognition of his undercover success and leadership.

Sing bids farewell to his classmates as the gates open one last time. At the gates, Miss Ho waits for him, hinting at a complicated, unresolved future.