This is classic sibling rivalry – with a fitspo twist.

If you’ve seen the posters for Margot vs Lily around town but haven’t been able to get to the bottom of what’s it is exactly, don’t worry – we’ve got the lowdown.

Nike’s new eight-episode original series tells the story of two adopted sisters: gym junkie Lily, a semi-famous fitness vlogger who has nearly a million followers but no real life friends; and social butterfly Margot, who pretty much lives in her trackpants and is addicted to video games.

In the first episode, the sisters challenge each other to a bet – that they could do better at the other sister’s life. The bet challenges them in ways they don’t expect, taking them waaaay out of their comfort zones.

The series is a collaboration between celebrated filmmaker Alfonso Gomez-Rejon (Me and Earl and the Dying Girl, American Horror Story: Coven), acclaimed director Tricia Brock (Girls, Silicon Valley) and bestselling author Jesse Andrews and ties in nicely with Nike Women’s #BetterForIt campaign.

Watch the trailer below and then tune in each week to view new episodes at nike.com/betterforit.