Kristina Grozeva was born in 1976 in Sofia, Bulgaria. She graduated from Sofia State University and worked as a journalist for the Bulgarian TV. After that, she enrolled in the National Academy for Theatre and Film Arts in Sofia.    Petar Valchanov was born in 1982 in Plovdiv, Bulgaria. He graduated from the National Art School Tsanko Lavrenov in 2000. He later earned a degree in film directing from the National Academy for Theatre and Film Arts.   Grozeva and Valchanov jointly directed the documentary Parable of Life (2009) and the TV film Forced Landing (2010). They also wrote and directed Jump (2012), the short film candidate from the Clermont-Ferrand International Short Film Festival for the 26th European Film Awards, becoming the first Bulgarian short film ever nominated for the EFA. Jump was also awarded the Grand Prix at the 16th Brussels SFF and the Excellence Award for Best Picture at the 30th Busan International Short Film Festival, among others. Additionally, their feature-length debut The Lesson (2014) was screened in the Contemporary World Cinema section of the 39th Toronto International Film Festival and won numerous awards at international film festivals.