Mouth to Mouth (2005 British film)

Along the way, a child member of the group, Manson, is accidentally killed when he jumps into a garbage can and hits an artery and his friend Mad Ax becomes heavily depressed.

Later, at a bacchanal with a bonfire, Nancy takes drugs, triggering an asthma attack that's treated by her inhaler.

Tensions arise between them on the drive and Sherry gets out of the car and returns on foot to the S*P*A*R*K group, where several of the female and male members have shaved their heads and have new rules such as no sex or alcohol.

Rose soon finds her and inexplicably wants to join S*P*A*R*K. She is initiated into the group after selling her house in Lisbon and donating the proceedings to S*P*A*R*K, and she too has her head shaved.

The rest of her hair is shaved and Sherry begins to see that Harry is psychologically abusing the entire group.