Reeling from a breakup, Po lands a job filming a documentary for the famous T-pop group MARS but gets off to a bad start with their brash leader Thame.

Po runs into a familiar face from his past. Later, he sets out on a new mission after discovering the message that Thame left for him.

To bring the band back together, Thame asks Po to convince a reluctant Jun to take part in their plan. But will their risky scheme succeed?

With Thame's impending departure, Po encourages him to open up to the rest of the band, leading to an unexpected plea for help.

As MARS starts working on their new single, Jun seems intent on keeping Thame and Po apart. The band runs into an unforeseen problem.

After learning the truth about Pepper's recent ordeal, Po reconsiders his romance with Thame. Later, the group faces difficult news about their careers.

Thame puts his reputation on the line to reconnect with Dylan and goes up against an underground rap crew that has it in for him.

The group goes on a camping trip and tries to get Nano on board with the reunion. Thame questions his feelings as Jun relentlessly taunts Po.

With months left before their concert, MARS plans their comeback. Pepper makes an unexpected decision that could upend things between Thame and Po.

After their recent setback, MARS scrambles to come up with a new song on a tight deadline. But can Thame and Jun overcome their rift and work together?

When a new crisis threatens to ruin the reunion, MARS tries to turn things around. Thame and Po's secret relationship becomes even riskier to maintain.

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MARS finally launches their new single, but will it top the charts? A movie date at Po's place leads to a romantic milestone for him and Thame.