[3][4] The series stars Hanna Ardéhn, Felix Sandman, William Spetz, Ella Rappich, David Dencik, Reuben Sallmander, Maria Sundbom, Rebecka Hemse, Arvid Sand, Helena af Sandeberg and Anna Björk.

At the age of 18, Maja Norberg is arrested and suspected of murder, while her ex-boyfriend, Sebastian "Sibbe" Fagerman, is dead at the scene.

[5] The six-episode series answers the main question concerning the extent of her complicity: As the only student left alive after the shooting, did she conspire with her boyfriend who planned the attack or is she an innocent bystander?

[8] Fagerman dying leaves Maja as the sole focus of international media attention.

[14] In July 2018, it was announced that Hanna Ardéhn, William Spetz, Felix Sandman, David Dencik, Reuben Sallmander, Anna Björk, Christopher Wollter, Evin Ahmad, Maria Sundbom, Rebecka Hemse, Helena af Sandeberg, Shanti Roney and Ella Rappich had been cast in the series.