Every time the lights go out, someone dies... The TARDIS materializes in an academy for top athletes, each hoping to make the team competing in the upcoming World Games. But is any of them capable of killing for this? The Doctor discovers that the students are hiding strange deaths. Teaming up with a swimmer named Emma, the Doctor begins to investigate - but doesn't expect to find an entire squad of Sontarans invading the academy! When the Sontarans begin their deadly interpretation of the World Games, the Doctor and Emma must find out what is really going on. But the Doctor is captured and forced to take part in the Sontaran Games. Can the Time Lord survive this deadly tournament?